Question

HELP

A family is building a firepit for their yard that is shaped like a rectangular prism. They would like for the firepit to have a volume of 134.4 ft3. If they already have the length measured at 6.4 feet and the height at 3 feet, what is the width needed to reach the desired volume? 4 feet 7 feet 67.2 feet 115.2 feet

Answer 1

(b) 7 feet

Explanation:

You want the width of a fire pit with a volume of 134.4 ft³ if it is 6.4 feet long and 3 feet high.

Volume

The volume of the pit is given by ...

V = LWH

Solving for W, we have ...

W = V/(LH) . . . . . . . . . divide by the coefficient of W

Then the width needed to give the desired volume is ...

W = (134.4 ft³)/((6.4 ft)·(3 ft)) = 7 ft

The width needed is 7 feet, choice B.

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