Question

A rectangle has length 72cm and 56cm.A second rectangle has the same area as this one,BUT ITS WIDTH IS 21 CM.WHAT IS THE LENGTH OF THE SECOND RECTANGLE

Answer 1

L = 192 cm

Explanation:

The area of a rectangle is given by (Width)*(Length)

1st Rectangle: (56 cm)*(72 cm) = 4032 cm^2

2nd Rectangle: Width is 21 cm and area is 4032 cm^2

(21 cm)*(L cm) = 4032 cm^2

(L cm) = (4032 cm^2)/(21 cm)

L = 192 cm