Question

The area of four walls of a room is 150 sq.m. If the length of the room is twice its breadth and the height is 4 metre,find the area of the floor.​

Answer 1

Answer: 78.125 cm²

Step-by-step explanation:

Given area of four walls = 150 m²

let breadth = b

Length is twice its breadth

Therefore length = 2b

Height = 4 m

Now curved surface area of cuboid = 2h(l+b)

2h(l+b)=C.S.A.

⇒2×4×(2b+b)=150

⇒8×3b=150

⇒b=8×3/ 150

=6.25cm

length;l = 2b = 2 x 6.25 = 12.50 cm

Area of floor = l x b= 6.25 x 12.50 = 78.125 cm²

Hence, area of the floor is 78.125 s.q.cm

Answer 2

Answer:

do rough calculation u need