Question

A room 5 m long, 4.5 m wide and 3.6 m high has one door 1.5 m by 2.4 m and two windows, each 1 m by 0.75 m. Find : 1) the area of the walls excluding doors and windows 2)the cost of distempering its walls at the rate of rupees 4.50 per m^2 3)the cost of painting its roof at the rate of rupees 9 per m^2​

Answer 1

Answer:

f (x ) = 4x / 2√1

2x\√1+2x²

f"(x) = 2√1+2x-2x

So the thrid term is 1/27 (x -2)²

Answer 2

Answer:

Length of a room = 4.5 m

Breath of a room = 3.8 m

Area = 4.5 m X 3.8

= 17 . 1 sq.m

Thus , area is 17 . 1 sq. m