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

Answer:

width=20 cm

Step-by-step 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

$\\ \sf\longmapsto \dfrac{3}{5}=\dfrac{12}{x}$

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

$\\ \sf\longmapsto 3x=60$

$\\ \sf\longmapsto x=\dfrac{60}{3}$

$\\ \sf\longmapsto x=20cm$