Question

The length of a rectangular playground is thrice its breath. If the perimeter of the playground is 56 metres, find its demensions.

Answer 1

Let the dimensions of the rectangular park are

$b=bm$

$l=2bm$

according to the problem given Perimeter of the park $=5bm$

$2(l+b)=5bm$

$2(3b+b)=5bm$

$2\left(4b\right)=5bm$

$8b=5bm$

$b=7m$

$l=3b$

$l=3\times 7$

$l=21m$