1.

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

Answer»

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



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