Question

A rectangle has a height of 3 cm and width of 5cm. A proportional rectangle has a height of 12cm. What would be the width?

Answer 1

width=20 cm

Explanation:

h=3 cm

w=5 cm

proportional rectangle:

height=12

• Here height has become 12 by multiplying 3 by 4.Therefore to find the width do the same thing.

width=5*4

=20 cm

Answer 2

The ratio will be same

• Let width be x

`\\ \sf\longmapsto (3)/(5)=(12)/(x)`

`\\ \sf\longmapsto 3x=5(12)`

`\\ \sf\longmapsto 3x=60`

`\\ \sf\longmapsto x=(60)/(3)`

`\\ \sf\longmapsto x=20cm`