Question

The handkerchief is 20cm long and 18cm broad. How much the breadth must be decreased to cover an area of 324 cm.square

Answer 1

Answer

breadth must be decreased by 1.8 cm

Step-by-step explanation:

1) original area = LxB = 20x18 = 360 cm square

2) decreased area given = 324

3) as no information is given about length therefore we keep the length fixed.

therefore L = 20

4) let breadth decreased be 'x'

5) new breadth = 18-x

6) new area => 20 * (18-x) = 324

360 - 20x = 324

x = 36/20

x = 1.8 cm

new breadth = 18-1.8 = 16.2 cm