A circle of a playground is to be fenced at
circumference.The cost of the fencing is Rs.150 per sqm.
what is the total cost , if the diameter is 70?
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Answer / antz
Rate should be Rs 150 per meter (not sqm).
(Rs 150 / m) * circumference
= (Rs 150 / m) * pi * diameter
= (Rs 150 / m) * (22/7) * 70 m
= Rs 150 * 22 * 10
= Rs 33000
| Is This Answer Correct ? | 15 Yes | 8 No |
Answer / ashutosh upadhyay
Seems like a trick in the question.
Rate is 150 per sq meters. Which can be interpreted as "150
Rs to fence a square whose area is 1 sq meter". Perimeter of
a square whose area is 1 sq meter is 4 meters (each side of
one meters).
So 4 meters => 150 Rs
Cost per meter => 75/2
Circumference of field => 2*22/7*35
Total cost for fencing the field => 2*(22/7)*35*(75/2)
= Rs 8250
| Is This Answer Correct ? | 11 Yes | 4 No |
Answer / siva
diameter is given 70 assume,itin terms of mm. then the
formula for area is pi/4*d square. so the area is 3846.5
rs. multiply with cost, total cost is 576975 rs.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / karthik.r
not to mention the unit of diameter .
but they mention 1sqm = rs.150
sqm is unit of area.
total area=22/7*r*r=22/7*35*35=3850sqm
total cost=3850*150=rs.5,77,500
i am considered diameter as meter
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / yashasvi yuvraj
Cost for Area(πr^2)= rs 150
Cost for 2πr^2=rs 2×150
Cost for 2πr(circumference)= rs (2×150)/r.
Now,
Circumference= 2×22/7×35=220
Cost of fencing= 220×(2×150)/r
=Rs 1885.7
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / nitasha sharma
(considering dia in meters)
dia:10
rad:5
circumfrence=2*pi*r=2*3.14.5=31.4
cost of fencing 1 sqmeter=150
then cost of fencing 31.4 sqmeter=31.4*150=4710
| Is This Answer Correct ? | 0 Yes | 0 No |
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