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If the length of a rectangle is increase...

If the length of a rectangle is increased by 40% and the breadth is decreased by 20%, then the area of the rectangle is increased by x%. The value of x is:
यदि किसी आयत की लंबाई 40% बढ़ा दी जाती है तथा चौड़ाई 20% कम कर दी जाती है, तो इस आयत का क्षेत्रफल x % बढ़ जाता है | x का मान है :

A

20

B

12

C

16

D

8

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