The base of a right prism is a triangle with sides 20cm, 21cm and 29cm. If its volume is 7560cm³, then its lateral surface area (in cm²) is ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 ie 2520.
(1/2) × B × H = (1/2) × 420 = 210
B × H = 7560
210 × H = 7560
H = 36
L.S.A. = Perimeter × Height
= 70 × 36
= 2520