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