Question

a rectangle has a length of 20cm and a width b cm. When its width is reduced by 4cm its area becomes 160cm^2. Find the original width and area of the rectangle.

Answer 1

Answer:

Length 12 cm

Area 240 cm²

Step-by-step explanation:

With length 20 cm and width (b-4) cm, the area is 160 cm²

=> 20(b-4) = 160

=> b-4 = 160 / 20 = 8

=> b = 12

So the original width is 12 cm.

The original area is

length × width = 20 cm × 12 cm = 240 cm²

Answer 2

The original width is 12cm and the area is 240cm square..