Question

Find the Vouco a cube of side 8 cm
7 The length, breadth and height of a room are 7 m, 6,5 m, and 3 m respectively. What is the volume
air in that room?
8- The area of the floor of a room is 67.5 sq. m. Its volume is 270 m. Find the height of the room.​

Answer 1

Answer:

Length, breadth and height of a room are 5 m, 4 m and 3 m.

Area of four walls of the room =2h(l+b)

=2×3(5+4)

=6(9)

=54 sq m

Area of the ceiling =l×b

=5×4

=20 sq cm.

Total area of the four walls and the ceiling of the room

=54+20

=74 sq cm

Cost of white washing = Rs 7.50 per sq m

Total cost of white washing =74×7.50= Rs 555

It is given that the area of the floor of the room is 67.5 m² and its volume is 270 m³. Hence, Height of floor of the room is 4 m.