Find the ratio of the speed of a cycle 15 km per hour to the speed of scooter 30 km per hour.

Sum

Given the speed of cycle = 15 km per hour

Scooter speed 30km/hr

Then ratio = 15:30 = `15/30`=`1/2`

So required ratio = 1:2

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Chapter 7 Comparing Quantities
EXERCISE 7.1 | Q 1. (a) | Page 81

Convert the following percentage to fractions and ratio:
125%

Divide Rs. 720 between Sunil, Sbhil and Akhil. So that Sunil gets 4/5 of Sohil’s and Akhil’s share together and Sohil gets 2/3 of Akhil’s share.

Which of the following numbers are in continued proportion:

3, 6 and 15

The ages of A and B are in the ratio 6 : 5. If A’s age is 18 years, find the age of B.

If 25, 35 and x are in continued proportion, find the value of x.

Find the duplicate ratio of 2 : 3

If `a/b = c/d = c/f`, prove that each ratio is `sqrt((3a^2 - 5c^2 + 7e^2)/(3b^2 - 5d^2 + 7f^2)`

Find the simplified form of the following ratio.

12 : 27

Which pair of ratios are equal? And why?

`2/3, 4/6`

In the following figure, the comparative areas of the continents are given: What is the ratio of the areas of