Question

A gateway is to be made of cardboard for a play set with dimensions as shown in the picture.

How much cardboard is needed for this?

• A. 131 $m^2$
• B. 140 $m^2$
• C. 150 $m^2$
• D. 170 $m^2$

Answer 1

The correct option is C 150 $m^2$

We can make it by joining three separate rectangles as shown below:

Now, area of the gateway = area of the new rectangle formed

Area = (4 + 5 + 6) $\times$ 10

= 15 $\times$10 = 150 $m^2$ (Lateral surface area of the prism)

Hence, 150 $m^2$ cardboard is required to make the gateway.