How much would it cost to build this road?

Question

$100 per ton

Need 1/2 mile long and 20 feet wide

$100 per 1 ton, 1 ton covers about 10 by 20 ft. of road. The road needs to be 3 inches dee

 

Answer 1

Let's change everything into feet:

 

Length = 1/2 mile = 1/2(5280) feet = 2640 feet

Width = 20 feet

Depth = 3 inches = 3/12 feet = 0.25 feet

 

Now, calculate the volume of the road:

 

V = (length)(width)(depth)

V = 2640(20)(0.25)

V = 13200 cubic feet

 

 

From here, it's not clear where to go. You've given the amount of square feet one ton covers (which would be fine if we were using the road's surface area), but not the amount of cubic feet one ton covers (which we need if we're going to use the road's volume). It's possible the problem is asking you to calculate the surface area and not the volume, but in that case, there's absolutely no use for the 3 inches measurement. Did you leave anything out of the problem?