Answer:
C) 10 cans
Explanation:
area of stage = area of rectangle + area of trapezoid
area of stage = LW + (1/2)(B + b)h
area of stage = (30 ft × 15 ft) + (1/2)(30 ft + 20 ft)(10 ft)
area of stage = 450 ft² + 250 ft²
area of stage = 700 ft²
1 can of wood finish coats 70 ft².
number of cans = (total area of stage)/(number of ft² covered by 1 can)
number of cans = (700 ft²)/(70 ft²)
number of cans = 10
Answer: C) 10 cans
P.S. Your drawing is not ugly at all. It looks great and shows all the dimensions needed to solve the problem.