Question

The perimeter of a rectangle is 40 m. Its length is four metres less than five times its breadth. Find the area of the rectangle.
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Answer 1

area of rectangle is 16

Answer 2

Answer:

P - 40

L - 5B-4. (1)

W.K.T P-2(L+B)

40 - 2(5B-4+B)

20 - (6B-4)

20+4 - 6B

24 - 6B

B - 24/6

B - 4,

put B - 4 in. (1)

L - 5(4)-4

L - 20-4

L - 16,

W.K.T,Area-L*B

A - 16*4

A - 64