Question

One piece of leftover plywood is 0.75 inches thick, 3 feet wide, and 7 feet long estimate the approximate surface area of two stacks of 11 pieces of leftover plywood. Round your answer to the nearest hundred

Answer 1

Answer:The approximate surface area of two stacks is 111.5 square ft.

Explanation:

We were Given : One piece of leftover plywood is 0.75 in. thick, 3 ft. wide, and 7 ft. long.

We are to Estimate the approximate surface area of two stacks of 11-piece leftover plywood ?

Solution :

length =7 ft.

The width = 3 ft.

The height = 0.75 in.

We have 11-piece leftover plywood.

i.e. 0.75*11=8.25in

Convert inches into ft,

1 inch = 1/12ft

8.25 inch =8.25/12 =0.6875 ft

The surface area formula is

SA=2(lw+wh+lh)

Substitute the values above:

SA=2(7×3+3×0.6875+7×0.6875)

SA=2(21+2.065+4.8125)

SA=2(27.875)

SA=55.75

Recall:The surface area of two stacks = 55.75×2=111.5

Therefore, the approximate surface area of two stacks is 111.5 square ft.

Answer 2

111.6ft^2 for the two stacks

Explanation:

0.75inch × 11 = 8.25 inches

8.25 inches = 0.69ft

Here dimensions are 3 ft. Wide, and 7 ft. Long and height of stack = 0.69ft

Surface area of one stack =

2*(LW+WH+LH)

= 2*(7*3 +3*0.69+7*0.69)

= 55.8 ft^2

Multiply by 2 to to get surface area of 2 stacks separately

55.8 × 2 = 111.6ft^2