Ratio And Proportion
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31 The speeds of three cars are in the ratio of 2:3:4 Find the ratio between the time taken by these cars to cover the same distance:
34 In a certain school, the ratio of boys to girls is 7 : 5. If there are 2400 students in the school, then how many girls are there in the school?
35 One-half of a certain number is equal to 65% of the 2nd number. Find the ratio of 1st to 2nd number:
36 Two numbers are in the ratio 2 : 3. If 9 is added to each number, they will be in the ratio 3 : 4. What is the product of the two numbers?
37 Amit and Sudesh have invested in the ratio of 4:7. If both invested a total amount of ₹ 49500, then find the investment of Sudesh:
38 The total weight of Sanjay and Suresh is 120 kg. If Sanjay weighs 30 kg more than Suresh, then what is the ratio of the weight of Suresh to that of Sanjay?