Question

find the cost of whitewashing a room of dimensions 6m×4.8m×4.2m ( including the ceiling) at the rate of rupees 25 per m².​

Answer 1

Answer:

₹3024

Step-by-step explanation:

Length = 6m

Breadth = 4.8m

Height = 4.2m

Volume of a cuboid( formula) = l×b×h

= 6m × 4.8m × 4.2m

= 120 .96 m³

Cost = Volume × rate

Cost for whitewashing one meter = ₹25

Cost of whitewashing 120.96 m³ = 120.96 × 25

=₹3024

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Answer 2

Step-by-step explanation:

Length: 6 m

Length: 6 mBreadth: 4.8 m

Length: 6 mBreadth: 4.8 mHeight: 4.2 m

Surface area required = Area of 4 Walls + Area of Ceiling

= CSA + (length × breadth) unit²

= 2(l + b) × h + (l × b) unit²

= 2(6 + 4.8) × 4.2 + (6 × 4.8) unit²

= (90.72 + 28.8) m²

= 119.52 m²

Cost = area × rate

= Rs. 119.52 × 25

= Rs. 2988