Question

(a
10. The length, breadth and height of a room
are 8 m, 5 m and 3 m respectively.
If density of air is 1.29 kg m-3, find the
mass of air in the room.
(
13. A​

Answer 1

Answer:

volume of room = l×b×h

8×5×3=120

Answer 2

Answer:

• Mass of Air in the room = 154.8 kg

Explanation:

Given

• Length, breadth and height of a room are 8m, 5m and 3m respectively.
• Density of air, D = 1.29 kg m⁻³

To find

• Mass of air in room, M =?

Solution

→ Volume of Room, V = length × breath × height

→ V = 8 m × 5 m × 3 m

→ V = 120 m³

Using formula

→ Density = mass / volume

→ Mass = density × volume

→ M = D × V

→ M = 1.29 × 120

→ M = 154.8 kg

Therefore,

• Mass of Air in the room is 154.8 kg.