Question

When each side of a square was reduced by 2 metres,its area became 49 sq.m.What was the side of the first square?

Answer 1

Let the side of first square be y.

Then, ( y - 2 )^2 = 49

So, ( y - 2 ) = 7

y = 7 + 2

y = 9

Therefore, the first square was 9cm by each side.