Question

A rectangle has a width of 3 cm and a perimeter of 16 cm. What is the width of a similar rectangle with a length of 20 cm?

Answer 1

First rect has length, 5, so new rect has 4* the length, thereby 4* the width.

So, 4*3 = 12, is the width of new rectangle...

Answer 2

first rect has a lenght of 13 cos perimeter=l+b
since the rect are similar the then the ratios wud b similar


using ratios
20/13=x/3
x=4.6
p=l+b
20+4.6
24.6