Page 187 - ICSE Math 5

 Number of boys = Total number of students – Number of girls
= 1,250 – 750 = 500

So, there are 500 boys in the school.

Exercise 13.2

1. Find the value of the following.
(a) 20% of ` 240 (b) 2.5% of 360 L
1
(c) 46 % of 140 kg (d) 82% of 1,900 m
2

(e) 24% of 3,200 m (f) 45% of 8,200 kg
4
(g) 19% of ` 7,800 (h) % of 5,600 km
5
2. Express the following as directed.

(a) 30 p as a percentage of ` 1 (b) 25 mm as a percentage of 40 cm

(c) 36 cm as a percentage of 3.6 m (d) 450 g as a percentage of 2 kg
(e) 72 L as a percentage of 800 L (f) 700 m as a percentage of 3.5 km

3. Solve the following word problems.

(a) If 20% of 150 bananas are spoilt, find the number of spoilt bananas.
(b) In a class of 50 students, if only 30 students were present on a rainy day then what
percentage of students were absent?

(c) Jane scored 480 marks out of 600. What is her percentage of marks?

(d) Out of 350 seats, 308 seats were occupied by the audience for the first show of a
play. What percentage of seats were occupied by the audience who watched the first
show?

(e) There are 92 working days in the first semester of a school. If Shaukat has 75%
attendance in the first semester, for how many days did Shaukat attend the
school?
(f) In a population of 3,14,900 people, 55% are men. What is the percentage and number
of women and children in the population?

(g) There are 960 apples in a box. If 120 out of 960 apples are rotten, what percentage
of rotten apples are there in the box?

(h) In a cricket match, Karandeep scores 120 runs for his team out of 360 runs. What
percentage of runs does he score?

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