Question

Laura plans to paint the 8 foot high rectangular walls of her room, and before she buys paint she needs to know the area of the wall surface to be painted. Two walls are 10 feet wide, and the the other 2 walls are 15 feet wide. The combined area of the 1 window and the 1 door in her room in 60 square feet. What is the area in square feet, of the wall surface Laura plans to paint? A.200 B.340 C.360 D.390 E.400

Answer 1

340

Explanation:

2 × (10 × 8) = 160

2 × (15 × 8) = 240

160 + 240 - 60 = 340 square feet

Answer 2

B: 340

Explanation:

We are told that her walls are 8 ft high.

Now, Two walls are 10 feet wide. Thus, area of the first two walls will be;

A1 = 2 × (10 × 8) = 160 sq.ft

Also, the other 2 walls are 15 feet wide.

Thus, Area of other two walls will be;

A2 = 2 × (15 × 8) = 240 sq.ft

We are told that the combined area of the 1 window and the 1 door in her room in 60 square feet.

This means that we will subtract 60 Sq.ft from the sum of the area of the 2 walls earlier calculated to get the total area to be painted.

Thus;

Area to be painted = 160 + 240 - 60 = 340 Sq.ft