A rectangle's perimeter to breadth ratio is 5 to 1. What is the length of a rectangle with a surface area of 216 square cm?
A. 16 cm
B. 18 cm
C. 24 cm
D. Data inadequate
Answer:B
A rectangle's perimeter to breadth ratio is 5 to 1. What is the length of a rectangle with a surface area of 216 square cm?
A. 16 cm B. 18 cm C. 24 cm D. Data inadequate
Explanation: 5/1 = 2(l + b)/b,5b = 2l + 2b,2l + 3b,2 l/3 = b.Then the area equals 216 cm2.216 = l x b.216 = l x 2 l/3.324 = l218 cm in length.