Question

The area of the rectangle shown is 66m^2

width = 4 2/5
length = x
work out the missing length x

Answer 1

143cm

Explanation:

Area=2(l+b)

Substitute the values for the variables.

66=2(l+22/5)

66=2xl+2x22

5

66=2l+44

5

Cross multiply

66x5=2l+44

330=2l+44

Collect like terms

-2l = 44-330

-2l = -286

-2l = -286

-2 -2

l=143

The missing length is 143m.