Question

A ratio is rec is 3:12 perimeter is 20cm find length breath and area

Answer 1

Step-by-step explanation:

Let the ratio be x

Length=3x

Breadth=12x

Hence

perimeter =2 (l+b)

20cm=2 (3x+12x)

20cm÷2=15x

10cm=15x

or,X=2/3

Then,

Length=3x=3×2/3=2 cm

Breadth =12x=12×2/3=8cm

Hence,

Area=(lb)

=(2×8)

=16Cm^2