25+25=50
18+18=36
50+36= 86
so the answer is B
answer
11 cans
step-by-step explanation
the area of a square = side * side
side = 55 feet
area = 55 * 55 = 3025 feet^2
cans = area / coverage
area = 3025 feet^2
coverage = 275 feet^2
cans = 3025/275 = 11
she will need 11 cans to paint the ceiling