It costs $0.60 per ft² to cover a right triangular field with sod. the side lengths of the field are 300 ft, 400 ft, and 500 ft.
what will it cost to cover the field with sod?
a) $36,000
b) $60,000
c) $72,000
d) $120,000

In this triangle, we know base & perpendicular are 300 & 400 'cause 500 is the longest side which is hypotenuse 

Now, Area of a triangle = ab/2 = (300)(400)/2 = 120000/2 = 60000

As cost for 1 ft² = $0.60
cost for 60000 ft² = 60000 * 0.60 = $36000

In short, Your Answer would be Option A

Hope this helps!

If you make you answer for clear i can answer it : )