A plot has a concrete path within its borders on all sides having the uniform width of 4m. The plot is rectangular with sides 20m and 15m. The charge of removing concrete is Rs. 6 per sq.m. How much is spent in removing all the concrete?
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Answer:
Total cost of removing concrete = Rs. 1296
Step-by-step explanation:
Concrete Area = Total Area - Non-Concrete Area
Subtracting width of the path from all the sides we get,
Length = 20 - 4 - 4
= 12 m
Breadth = 15 - 4 - 4
= 7 m
∴ Concrete Area = (20 × 15) - (12 × 7)
= 300 - 84
= 216 square meters
Total cost of removing concrete = Rate × Area
= 6 × 216
= Rs. 1296
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