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Unlocking the Power of Ratios: Your Comprehensive Guide to JNV Class 9 Entrance Exam Math Prep

Writer's picture: Komal SharmaKomal Sharma

Welcome to JNVMaths.com, your trusted source for mastering Direct and Inverse Ratio concepts as part of your Jawahar Navodaya Vidyalaya Class 9 Entrance Exam math preparation journey. In this engaging blog post, we'll dive deep into the intricacies of Direct and Inverse Ratios, ensuring you have a firm grasp of these crucial topics for your upcoming exam.


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Direct and Inverse Ratio: A Comprehensive Guide: Direct and Inverse Ratio is a fundamental topic that plays a pivotal role in various mathematical concepts and real-world applications. At JNVMaths.com, we believe in making learning not only comprehensive but also enjoyable. Here's how we aim to help you excel in understanding Direct and Inverse Ratios:

  1. Detailed Explanations: We'll provide in-depth explanations of Direct and Inverse Ratios, breaking down complex concepts into easy-to-understand segments. You'll gain a solid foundation in these topics.

  2. Examples Galore: Learning through examples is an effective way to grasp mathematical concepts. We'll walk you through numerous examples and solutions, covering a wide range of scenarios.

  3. Visual Aids: To enhance your understanding, we'll incorporate visual aids such as diagrams, charts, and graphs, making abstract ideas more tangible.

  4. Practical Applications: Explore how Direct and Inverse Ratios are applied in real-life situations, helping you see the relevance of these concepts in everyday life.

  5. Interactive Quizzes: Keep your engagement levels high with interactive quizzes that allow you to test your knowledge and track your progress.

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प्रश्न: अंकिता आधे घंटे में 540 शब्द टाइप करती है। वह 120 सेकंड में कितने शब्द टाइप कर सकती है?

a. 3

b. 12

c. 36

d. 28

उत्तर: c


प्रश्न: एक ट्रेन 80 किमी/घंटा की गति से 2 घंटे में दूरी तय करती है । तो उसी दूरी को 90 किमी/घंटा की गति से तय करने में कितना समय लगेगा ?

a. 1 घंटा 46 मिनट

b. 1 घंटा 30 मिनट

c. 1 घंटा 50 मिनट

d. 1 घंटा 40 मिनट

उत्तर: a


प्रश्न: पेट्रोल पंप पर एक मशीन 60 मिनट में 500 लीटर पानी भरती है। 750L भरने में कितना समय लगेगा?

a. 88 मिनट

b. 82 मिनट

c. 89 मिनट

d. 90 मिनट

उत्तर: d


प्रश्न: यदि 52 आदमी 5 दिनों में काम कर सकते हैं। 26 आदमी उसी काम को कितने दिनों में करेंगे?

a. 16 दिन

b. दस दिन

c. बारह दिन

d. 18 दिन

उत्तर: b


प्रश्न: मानचित्र का पैमाना 1:500 दिया गया है। मानचित्र पर दो शहर 7 किमी दूर हैं। उनके बीच वास्तविक दूरी क्या है?

a. 3500 किमी

b. 35 कि.मी.

c. 35000 किमी

d. इनमें से कोई भी नहीं 

उत्तर: a



प्रश्न: यदि मोटे कागज की 10 शीटों का वजन 40 ग्राम है। एक ही कागज की कितनी शीटों का वजन 1700 ग्राम होगा?

a. 42.5 शीट

b. 425 शीट

c. 325 शीट

d. 300 शीट

उत्तर: b


प्रश्न: यदि x और y व्युत्क्रमानुपाती हैं, तो कौन सा सत्य है?

a. x1/y1 =x2/y2

b. x1/x2=y1/y2

c. x1/x2=y2/y1

d. x1/y2=x2/y1

उत्तर: d 


प्रश्न: एक टंकी को 1 घंटा 20 मिनट में भरने के लिए 6 पाइपों की आवश्यकता होती है। यदि हम एक ही प्रकार के 8 पाइपों का उपयोग करें तो एक ही टंकी को भरने में कितना समय लगेगा?

a. 60 मिनट

b. 30 मिनट

c. 140 मिनट

d. 160 मिनट

उत्तर: b


प्रश्न: एक आदमी 5 घंटे में 20 किमी चलता है। ज्ञात कीजिए कि उसे 32 किमी चलने में कितना समय लगेगा?

a. 3 घंटे

b. चार घंटे

c. 6 घंटे

d. 8 घंटे

उत्तर: d


प्रश्न: यदि 300 किलोग्राम कोयले की कीमत 6000 है, तो 120 किलोग्राम कोयले की कीमत क्या है?

a. 1200 RS

b. 2400 RS

c. 3200 RS

d. 4200 RS

उत्तर: B 


प्रश्न: मानवी 30 मिनट में 200 शब्द टाइप करती है। ज्ञात कीजिए कि वह 12 मिनट में कितने शब्द टाइप करेगी?

a. 100

b. 80

c. 60

d. 50

उत्तर: b


प्रश्न: 120 व्यक्तियों को एक कार्य पूरा करने में 40 दिन लगते हैं। उसी कार्य को पूरा करने में 80 व्यक्तियों को कितना समय लगेगा?

a. 50 दिन

b. 60 दिन

c. 80 दिन

d. 100 दिन

उत्तर: b 


प्रश्न: यदि एक टंकी को 80 मिनट में भरने के लिए 6 पाइपों की आवश्यकता होती है। तो ज्ञात कीजिए कि यदि एक ही प्रकार के केवल 5 पाइपों का उपयोग किया जाए तो कितना समय लगेगा?

a. 96 मिनट

b. 102 मिनट

c. 106 मिनट

d. 108 मिनट

उत्तर: a



Question: Ankita types 540 words in half an hour. How many words can she type in 120 seconds?

a. 3

b. 12

c. 36

d. 28

Answer: c


Question: A train covers a distance in 2 hours at a speed of 80 km/hr. Then how much time will it take to cover the same distance at a speed of 90 km/hr?

a. 1 hour 46 minutes

b. 1 hour 30 minutes

c. 1 hour 50 minutes

d. 1 hour 40 minutes

Answer: a


Question: A machine at a petrol pump fills 500 liters of water in 60 minutes. How much time will it take to fill 750L?

a. 88 minutes

b. 82 minutes

c. 89 minutes

d. 90 minutes

Answer: d

Question: If 52 men can do the work in 5 days. In how many days will 26 men do the same work?

a. 16 days

b. ten days

c. twelve days

d. 18 days

Answer: b



Question 5: The scale of the map is given as 1:500. Two cities on the map are 7 km apart. What is the actual distance between them?

a. 3500 km

b. 35 km

c. 35000 km

d. none of these

Answer: a


Question: If the weight of 10 sheets of thick paper is 40 grams. How many sheets of the same paper will weigh 1700 grams?

a. 42.5 sheet

b. 425 sheet

c. 325 sheet

d. 300 sheets

Answer: b


Question: If x and y are inversely proportional, which is true?

a. x1/y1 =x2/y2

b. x1/x2=y1/y2

c. x1/x2=y2/y1

d. x1/y2=x2/y1

Answer: d


Question: 6 pipes are required to fill a tank in 1 hour 20 minutes. If we use 8 pipes of the same type, how much time will it take to fill the same tank?

a. 60 minutes

b. 30 minutes

c. 140 minutes

d. 160 minutes

Answer: b


Question: A man walks 20 km in 5 hours. Find how much time will he take to walk 32 km?

a. 3 hours

b. four hours

c. 6 hours

d. 8 hours

Answer: d


Question: If the price of 300 kg coal is Rs 6000, what is the price of 120 kg coal?

a. 1200 RS

b. 2400 RS

c. 3200 RS

d. 4200 RS

उत्तर: b


Question: Manvi types 200 words in 30 minutes. Find how many words she will type in 12 minutes?

a. 100

b. 80

c. 60

d. 50

Answer: b


Question: 120 people take 40 days to complete a piece of work. How much time will 80 people take to complete the same work?

a. 50 days

b. 60 days

c. 80 days

d. 100 days

Answer: b


Question: If 6 pipes are required to fill a tank in 80 minutes. Then find how much time will be taken if only 5 pipes of the same type are used?

a. 96 minutes

b. 102 minutes

c. 106 minutes

d. 108 minutes

Answer: a


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