John is expanding his garden. Currently it is 4m wide and 10m long. He doubles the width and quadruples the length. How does this affect the area of the garden?

Question

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Answer 1

Let the length be l and width be w.

Given, l = 10m and w = 4m

So Old Area = l * b = 40 m^2

After expansion, let new length be L and new width be W. So,

L = 4*l = 4* 10

and W = 2*w = 2*4

New Area = L*B = 4*10 * 2*4 = 40 * 8 = 320 m^2

Answer 2

It multiplies the area by 8.

Original area = 4×10=40m², new area = 8×40=320m².