Question

A rectangle has a length of 12 m and a width of 400 cm. What is the perimeter of the rectangle? (Hint: all units must be the same)

A.2000 cm
B.3200 cm
C.824 cm
D.1600 cm

Answer 1

The answer is option B

Explanation:

Perimeter of a rectangle = 2l + 2w

where

l is the length

w is the width

From the question

l = 12m

w = 400 cm

First we must convert the length from meters to centimeters

1 m = 100 cm

12 m = 12 × 100 = 1200 cm

So l = 1200 cm

Substitute the values into the above formula

We have

Perimeter = 2(1200) + 2(400)

= 2400 + 800

We have the final answer as

Perimeter = 3200 cm

Hope this helps you