Question

Select the correct answer.

The perimeter of a rectangle is 42 inches. If the width of the rectangle is 6 inches, what is the length?
A.
12 inches
B.
15 inches
C.
21 inches
D.
40 inches

Answer 1

option b, 15 inches is the length of the rectangle

Answer 2

Perimeter of rectangle is:

`\boxed{ \purple{ \tt \: Perimeter = 2(l + b)}}`

We are given width/breadth = 6 inches

`\pink{ \sf \: 42 = 2(l + 6)}`

`\pink{ \sf \: 21=l+6 }`

`\pink{ \sf \: l = 21 - 6 }`

`\boxed{ \red{ \rm\: l = 15 \: inches}}`