Final answer:
To find the total surface area covered by two pools, each with dimensions of 7 m by 3.5 m, you multiply the area of one pool by 2 to get 49 sq. m, which is not one of the provided answer options.
Step-by-step explanation:
The problem is asking us to calculate the surface area that two pools of given dimensions will cover in a backyard. When calculating the surface area of a rectangle, you multiply its length by its width. In this case, the rectangle has dimensions of 7 m × 3.5 m. To find the area of one pool, we calculate:
7 m × 3.5 m = 24.5 sq. m
To find the total surface area covered by two pools, we multiply the area of one pool by 2:
24.5 sq. m × 2 = 49 sq. m
Therefore, the total surface area covered by the two pools is 49 sq. m, which is not one of the given options (A) 24.5 sq. m, (B) 10.5 sq. m, (C) 28 sq. m, (D) 12.5 sq. m. It seems there may have been a misprint in the question's options.