Question

The dimensions of a room are 12.5m by 9m by 7m.
There are 2 doors and 4 windows in the room; each
door measures 2.5m by 1.2m and each window 1.5m by 1m. Find the cost of the painting the wall at ₹3.50per square metre.​

Answer 1

Step-by-step explanation:

Given =Length=12.5m

Breadth =9m

Height =7m

A/Q,

Area of room=2(L+b)h=2(12.5m+9m)7=301m^2

Area of 1 doors =(2.5mX1.2m)=3m^2

Area of two doors =3m^2X2=6m^2

Area of 1 windows=(1.5mX1m)=1.5m^2

Area of 4 windows =1.5mX4=6m^2

Total area of Door and window=6m^2+6m^2=(12m^2)

Remaining Area =(301–12)=289m^2

Cost of 1m^2=₹3.50

Cost of 292m^2=₹(=289X3. 50)=₹1,011.5