Question

A rectangle is 8 CM long and 5 CM wide. It's perimeter is doubled when each of its sides is increased by x

Answer 1

$perimeter = 2(8 + 5) \\ = 26 \\ 26 + 4x = 52 \\ x = 6.5$

Answer 2

P= 2(8+5) = 26 cm

Perimeter is doubled = 52 cm

Each side is increased by x cm.

Therefore,

2( 8+x+5+x) = 52

2 (13+2x) = 52

26 + 4x= 52

4x = 26

x= 26/4

= 6.5 cm

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