SOLUTION: Mr. Trevino built a square sandbox measuring 7 feet by 7 feet. He wants to fill the sandbox to a depth of 18 inches with sand, as shown in the figure below. The sand comes in 50-po

Question 747029: Mr. Trevino built a square sandbox measuring 7 feet by 7 feet. He wants to fill the sandbox to a depth of 18 inches with sand, as shown in the figure below. The sand comes in 50-pound bags. If each bag contains about 0.70 cubic feet of sand, how many bags are needed to fill the sandbox?
Answer by josgarithmetic(39616) (Show Source): You can put this solution on YOUR website!
Try to keep all units as feet and pounds, or including cubic feet for volume. Recognize for convenience that 18 inches is one and a half feet.

Volume of the sandbox to fill is .

Use the ratio of 50 pounds .... what you need to know is 1 bag per 0.70 ft^3. You might also use it as 0.70 cubic feet per 1 bag.

The needed expression:
and note that units are as

That is 73.5 cubic feet, and 105 bags
(?)

RELATED QUESTIONS
Fred has built a rectangular sandbox with a perimeter of 48 feet and a length that is... (answered by ankor@dixie-net.com)

What’s the answer to this problem A rectangular sandbox is surrounded on all sides... (answered by ikleyn)

mr rich had a custom built sandbox made forhis young son. In order to personalize it he... (answered by ankor@dixie-net.com)

The owner of a daycare center plans to have a rectangular sandbox built in the outdoor... (answered by jim_thompson5910)

The owner of a daycare center plans to have a rectangular sandbox built in the outdoor... (answered by Alan3354)

this is three dimensional figures: a rectangular sandbox is 3 feet by 4 feet. The depth... (answered by mananth)

A Rectangular Sand Box Is 3 Feet By 4 Feet. The Depth Of The Box Is 8 Inches, But The... (answered by Boreal)

Tim bought 128 sandbags to completely fill a cube-shaped sandbox. Each bag fills a cubic... (answered by MathLover1)