Find the cost of painting a wall of length 60 m and breadth 15 m at the rate of ₹4 per square m.

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Solution

Given,
Length = 60 m
Breadth = 15 m
Area = Length × Breadth
= 60 × 15
= 60 × (10 + 5)
= 600 + 300
= 900 square m

Cost of painting 1 square m of the wall = ₹4
Total cost of painting the wall = Cost of painting 1 square cm × Area of the wall
= 4 × 900
= 3600

Therefore, the total cost of painting the wall is ₹3600.

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