Find the cost of whitewashing of the room of dimensions 15 m × 12 m × 10m at the rate of ₹ 2.50 per m²
Answers
Given:
- Length of the room = 15m
- Breadth of the room = 12m
- Height of the room = 10m
To Find:
- Cost of whitewashing the room at the rate of ₹ 2.50/m² = ??
Formula Used:
- Area of 4 walls of a room = {2(l + b) × h} sq. units
- Area of the roof of a room = (l × b) sq. units
Solution:
As, it is given that:
Length of the room = 15 m
Breadth of the room = 12 m
Height of the room = 10 m
Therefore,
Area of four walls of the rooms = {2(l + b) × h} sq. units
= {2(15 + 12) × 10} m²
= {2 × 27 × 10} m²
= {54 × 10} m²
= 540 m²
Area of the roof of the room = (l × b) sq. units
= (15 × 12) m²
= 180 m²
Total area to be whitewashed = (Area of 4 walls + Area of roof)
= (540 + 180) m²
= 720 m²
Cost of whitewashing the room = ₹(2.5 × 720)
= ₹ 1800
Hence, cost of whitewashing the room at the rate of ₹ 2.50/m² is ₹ 1800.
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