Question

What is the area of a rectangular room that's 18ft by 21ft?

A. 378 ft²
B. 399 ft²
C. 441 ft²
D. 459 ft²

Answer 1

The area of a rectangular room measuring 18ft by 21ft is 378 square feet, which corresponds to Option A: 378 ft².

Step-by-step explanation:

The area of a rectangular room can be calculated by multiplying the length by the width. For a room that is 18ft by 21ft, the area is:

Area = Length × Width = 18ft × 21ft = 378 ft².

Therefore, the correct answer is Option A: 378 ft².