Q.3. A path 5m wide runs along inside a square park of side
400m. Find the area of the path. Also find
the cost of cementing it at the rate of Rs.40 per meter.
Answers
Answered by
2
Answer:
Given inner side of square park, s=100 cm
Area of inner square =1002=10000 cm2
width of path,w=5 cm
Outer side of square =100+5+5=110 cm
Area of outer square =1102=12100 cm2
Area of path =12100−10000=2100 cm2
Cost of cementing at the rate of Rs 250 per 10 sq cm = Rs 250×210= Rs 52500
∴ Cost of cementing a 2100 cm2 path =Rs. 52500
Answered by
12
Area of square= side × side
side= 400m
= 400×400
= 1,60,000
Area of the path= side × side
side= 5m
= 5×5
= 25m
Cost of cementing at rate 1 per meter= Rs. 40 per meter
Cost of cementing it at the rate of 25 per meter= 40×20
= Rs. 800
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