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प्रश्न
The perimeter of a rectangle is 60 cms. If its length is twice its breadth, then its area is:
पर्याय
200 cm2
180 cm2
160 cm2
220 cm2
उत्तर
The perimeter of a rectangle is 60 cms. If its length is twice its breadth, then its area is: 200 cm2
Explanation:
Let the breadth of the rectangle is b, then the length of the rectangle is 2b.
Perimeter = 2 (length + breadth)
60 = 2 (2b + b)
6b = 60
6b = `60/6` = 10
Area of the rectangle = length × breadth
= 2b × b = 2b2
= 2 (10)2 = 200 cm2
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