Question

1. The perimeter of the floor of a class room is 20 m. If the height of the room is 4m,
the area of 4 walls will be:
a) 160 sqm b) 80 sqm c) 100 sqm d) 40 sqm
is 20​

Answer 1

area of four walls = L.S.A

L.S.A = base perimeter × height

L.S.A = 20 × 4

L.S.A= 80 m²

option (b) 80 m²

hope it helps !!