Question

all school room is 11 metre long and 8 metre wide and 5 metre height the area of its four wall is​

Answer 1

Area of four wall = lateral surface area of cuboid

• =2(l+b)h
• =2(11+8)5
• =10*19
• =190 sq. m.

Answer 2

lateral surface area of cuboid =2h(l+b) ,,,,then putting value. 2×5( 11+8). = 10 (17) = 170 is the area for the four walls .. hope this will help you