SOLUTION: Suppose that Bob is building a shed and needs to pour a concrete slab to support it. Bob knows the slab will be 15 feet wide, 10 feet long, and 6 inches deep. Concrete is usually s

Algebra ->  Conversion and Units of Measurement -> SOLUTION: Suppose that Bob is building a shed and needs to pour a concrete slab to support it. Bob knows the slab will be 15 feet wide, 10 feet long, and 6 inches deep. Concrete is usually s      Log On


   

Question 916428: Suppose that Bob is building a shed and needs to pour a concrete slab to support it. Bob knows the slab will be 15 feet wide, 10 feet long, and 6 inches deep. Concrete is usually sold by the cubic yard. How many cubic yards of concrete will Bob need for the slab?
Please help me I have no clue what to do! Thank you :D
Found 2 solutions by josgarithmetic, MathLover1:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Keep and use all unit either as yards or as feet; so convert feet to yards or convert yards to feet.

3 feet = 1 yard
1 foot = 12 inches

That is the clue. Can you use it?

Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!
the slab :
W=15ft, L=10ft%7D%7D%2C+and+%7B%7B%7Bh=6in
Concrete is usually sold by the cubic +yard.
first convert everything in +yards
1Foot+=+0.333Yards
1Inch+=+0.02778Yards+

W=15ft=> W=15%2A0.333Yd=> W=+4.999Yd+
L=10ft%7D%7D+=%3E%7B%7B%7BW=10%2A0.333Yd=> W=+3.333Yd+
h=6in =>h=6%2A0.02778+Yd =>h=+0.16667yd+

volume:
V=L%2AW%2Ah
V=3.333Yd%2A4.999Yd+%2A0.16667yd
V=2.777yd%5E3
Bob will need for the slab 2.777yd%5E3 of concrete.