NCERT Class 7 Mathematics Solutions: Chapter 8 –Comparing Quantities Exercise 8.1 Part 1

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1. Find the ratio of:

(a)

(b)

(c)

(d)

Answer:

To find ratios, both quantities should be in same unit.

(a)

paise to paise [ ]

So, the ratio is

(b)

[ ]

So, the ratio is

(c)

[ ]

So, the ratio is

(d)

hours to hours

hours to hours

So, the ratio is

2. In a computer lab, there are computers for every students. How many computers will be needed for students?

Answer:

students need computers

student needs computers

students need

Computers

So, computers will be needed for students.

3. Population of Rajasthan lakhs and population of U.P. lakhs. Area of Rajasthan and area of U. P. .

(i) How many people are there per in both states?

(ii) Which state is less populated?

Answer:

(i) People present per

In Rajasthan

In U.P.

people per

(ii) Rajasthan is less populated.