Question

Find the lateral surface area and total surface area of square based prism with base edge $5$cm and height $10$cm.

Answer 1

We are given $a=5$cm, $h=10$cm. We have to find L.S.A and T.S.A. Perimeter of the square $P=4a=4\times 5=20$cm. Hence L.S.A$=Ph=20\times 10=200c{m}^2$.
T.S.A.$=2B+Ph=2a^2+Ph=2\times 5^2+200=50+200=250c{m}^2$.