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NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1

NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1 are part of NCERT Solutions for Class 8 Maths. Here we have given NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1.

  • Comparing Quantities Class 8 Ex 8.2
  • Comparing Quantities Class 8 Ex 8.3
Board CBSE
Textbook NCERT
Class Class 8
Subject Maths
Chapter Chapter 8
Chapter Name Comparing Quantities
Exercise Ex 8.1
Number of Questions Solved 6
Category NCERT Solutions

NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1

Ex 8.1 Class 8 Maths Question 1.
Find the ratio of the following :
(a) Speed of a cycle is 15 km per hour to the speed of scooter 30 km per hour.
(b) 5 m to 10 km
(c) 50 paise to ₹ 5
Solution:
(a) Speed of cycle which is 15 km/hr to the speed of scooter which is 30 km/hr = 15 km : 30 km = 1:2.
(b) 5 m to 10 km = 5m : 10 km [∵ 1 km = 1000 m, ∴ 10 km = 10000 m]
= 5 m : 10000 m
= 1 : 2000
[Dividing the 1st and 2nd terms by their HCF = 5]
(c) 50 paise to ₹ 5 = 50 paise : ₹ 5 [₹ 1 = 100 paise, ₹ 5 = 500 paise]
= 50 paise : 500 paise
= 1 : 10
[Dividing the 1st and 2nd terms by their HCF = 50]

Ex 8.1 Class 8 Maths Question 2.
Convert the following ratios to percentages :
(a) 3 : 4
(b) 2 : 3
Solution:
NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities 1
Ex 8.1 Class 8 Maths Question 3.
72% of 25 students are good in mathematics. How many are not good in mathematics?
Solution:
72% of 25 students are good in mathematics.
∴ (100 – 72)%, i. e., 28% of 25 students are not good in mathematics.
Thus, their number = 28% of 25
\(=\left( \frac { 28 }{ 100 } \times 25 \right) =7\) students

Ex 8.1 Class 8 Maths Question 4.
A football team won 10 matches out of the total number of matches they played. If their win percentage was 40, then how many matches did they play in all?
Solution:
Let x games be played in all.
Since 40% of the total games is given as 10,
∴ 40% of x = 10
⇒ \(\frac { 40 }{ 100 } \times x=10\)
⇒ \(x=\frac { 100 }{ 40 } \times 10=25\)

Ex 8.1 Class 8 Maths Question 5.
If Chameli had ₹ 600 left after spending 75% of her money, how much did she have in the beginning?
Solution:
Suppose total money with Chameli at the beginning be ₹ 100.
NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities 2

Ex 8.1 Class 8 Maths Question 6.
If 60% people in a city like cricket, 30% like football and the remaining like other games, then what per cent of the people like the other games? If the total number of people are 50 lakh, find the exact number who like each type of game.
Solution:
We have,
People who like cricket = 60%
People who like football = 30%
∴ People who like other games = (100 – 60 – 30)% =10%
Total number of people = 5000000
∴ People who like cricket = \(\frac { 60 }{ 100 } \times 5000000\)
= 3000000 = 30 lakh
People who like football = \(\frac { 30 }{ 100 } \times 5000000\)
= 1500000 =15 lakh
and, the people who like other games
= \(\frac { 10 }{ 100 } \times 5000000\)
= 500000 = 5 lakh.

We hope the NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1 help you. If you have any query regarding NCERT Solutions for Class 8 Maths Chapter 8 Comparing Quantities Ex 8.1, drop a comment below and we will get back to you at the earliest.

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