Jesse S. answered • 09/20/17

Patient and knowledgeable Math tutor

First calculate how much they will need

converting the 6 inches =0.5 ft

50 * 40 * 0.5 = 1000 ft

Option : a)

(1000 / 3)* 2.25 = $750

Option : b)

Convert cubic feet to cubic yards by the formula

yd³ = ft³ * 0.037037

1000 * 0.037037 = 37.037

(37.037 * 18) + 50 = $716.66

So option b is cheaper.

50 * 40 * 0.5 = 1000 ft

^{3}Option : a)

(1000 / 3)* 2.25 = $750

Option : b)

Convert cubic feet to cubic yards by the formula

yd³ = ft³ * 0.037037

1000 * 0.037037 = 37.037

(37.037 * 18) + 50 = $716.66

So option b is cheaper.