Multiple choice

If the volume of right prism having triangular base with sides 20cm, 21cm and 29cm, is 7560 cm3. Then find its lateral surface area (in cm2)

  1. 2448

  2. 2556

  3. 2484

  4. 2520
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Triangle sides 20, 21, 29 form a right triangle (20²+21²=29²). Base area = (1/2)×20×21 = 210. Volume = 7560, so height = 7560/210 = 36. Lateral surface area = perimeter × height = (20+21+29)×36 = 2520.

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