Question

The side of the base of a triangluar prism are 13cm,14cm,15cmand height is 20cm find it's total surface area and lateral surface area

Answer 1

lateral surface area=
$2 \times 13 \times 20 + 2 \times 20 \times 14 + 2 \times 15 \times 20 = 520 + 560 + 600 = 1680$