Page 143 - ICSE Math 4

Example 11: If 2 m 50 cm of cloth is used for making a frock, how much cloth is required
for making 7 such frocks?
Solu on: Cloth required for making a frock = 2 m 50 cm = 250 cm Calcula on
3
Number of frocks to be made = 7 2 5 0

Cloth required for making 7 frocks = 250 cm × 7 × 7
= 1,750 cm 1 7 5 0

= 17 m 50 cm

So, 17 m 50 cm of cloth is required for making 7 such frocks.
Example 12: If 10 m cloth is required to make 5 pants. How much cloth is required to make
1 pant?
Calcula on
Solu on: Cloth required for making 5 pants = 10 m 2

 Cloth required for making 1 pant = 10 m  5 = 2 m 5 10
– 10
So, 2 m cloth is required for making 1 pant.
0

Exercise 11.3

1. Mul ply the following.
(a) 6 m 20 cm by 23 (b) 1 km 123 m by 18 (c) 14 m 67 cm by 6

(d) 10 m 34 cm by 5 (e) 50 km 320 m by 2 (f) 6 km 639 m by 13

2. Divide the following.

(a) 4 km 775 m by 5 (b) 7 m 92 cm by 6 (c) 8 m 82 cm by 7
(d) 6 km 150 m by 5 (e) 7 m 32 cm by 4 (f) 8 km by 5

3. Solve the following word problems.
(a) If 50 cm lace is required for s tching a curtain, how much lace is required for
s tching 8 such curtains? Give your answer in metres.

(b) The total length of a rope is 25 m. If it is cut into 5 equal pieces, what will be
the length of each piece of the rope?

(c) The length of a bedsheet is 3 m 25 cm. What is the length of 4 such bedsheets?
(d) Varsha walks 14 km in a week. If she walks the same distance each day, how far
does she walk in a day?

Measurement of Weight

Weight is a measure of how heavy or light an object is. Weights of objects are generally
measured in kilograms and grams.

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