Question

A rectangle is 16 cm. in length. Its width is 50% of its length. what is its perimeter?

Answer 1

Answer: 48 cm

Explanation:

A perimeter(P) of a rectangle is equal to 2(L + W), or 2L + 2W, so we write the equation as:

1st way:

W = 50%(16) = 0.5 x 16 = 8

P = 2(L + W)

P = 2(16 + 8)

P = 2(24)

P = 48 cm

2nd way:

P = 2L + 2W

P = 2(16) + 2[50%(16)]

P = 2(16) + 2[0.5 X 16]

P = 32 + 2(8)

P = 32 + 16

P = 48 cm

Answer 2

50% of 16 is 8 so it would be 16+16+8+8 which equals 48