The area of a rectangular field is $15$ times the sum of its length and breadth. If the length of that field is $40$ metres, what is the breadth of that field?

24

metres

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25

metres

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20

metres

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28

metres

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Solution

The correct option is A $24$ metres
Area $= 15 (L + B)$ [Given]
$\Rightarrow L \times B = 15 (L + B) \Rightarrow 40 B = 15 (40 + B)$
$\Rightarrow 25 B = 600 \Rightarrow B = 24 m .$

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