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Question

Ted bought 28 rectangular grass beds. Each of it has a length 10cm and breadth15cm. When he arranged them on his lawn, 4 beds were left unused. Find the area of the lawn (in square cm).


A

4200

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B

3600

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C

0.36

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D

360

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Solution

The correct option is B

3600


Area of a rectangle = length×breadth

Each grass bed has a rectangular shape.

The area of each grass bed = 10×15=150 cm2

Number of grass beds that were bought = 28

4 beds were unused. Therefore, no. of grass beds used = 28-4 = 24

Thus area of the lawn = 24×area of each grass bed=24×150=3600 cm2


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