Find the cost of paving the circular path of width 7m around a circular lawn of radius 49 m at the rate of Rs.20 per sq.. m.
Answers
Answered by
8
Area of circular lawn=πr²=>22/7×49²=>7546
Area of path=49+7=>56m
Area of path=>πr²=>22/7×56²
==>9856
Cost=(Area of path-Area of circular lawn)×20
=(9856-7546)×20
=2310×20=>rs.46200
Area of path=49+7=>56m
Area of path=>πr²=>22/7×56²
==>9856
Cost=(Area of path-Area of circular lawn)×20
=(9856-7546)×20
=2310×20=>rs.46200
these are the options given
Answered by
9
hiii!!!
here's ur answer...
given the radius of the circular lawn is 49m.
area of the circular lawn = πr²
= 22/7 × 49 × 49
= 22 × 7 × 49
= 7546m²
ATQ,
7m wide path is constructed around the circular lawn.
radius of the circular lawn along with the path = 49 + 7 = 56m
area of the circular lawn along with the path = πr²
= 22/7 × 56 × 56
= 22 × 8 × 56
= 9856m²
therefore area of the path = 9856 - 7546
= 2310m²
total cost of paving the path at the rate of ₹20 per m² = 2310 × 20
= ₹46200
hope this helps..!!
here's ur answer...
given the radius of the circular lawn is 49m.
area of the circular lawn = πr²
= 22/7 × 49 × 49
= 22 × 7 × 49
= 7546m²
ATQ,
7m wide path is constructed around the circular lawn.
radius of the circular lawn along with the path = 49 + 7 = 56m
area of the circular lawn along with the path = πr²
= 22/7 × 56 × 56
= 22 × 8 × 56
= 9856m²
therefore area of the path = 9856 - 7546
= 2310m²
total cost of paving the path at the rate of ₹20 per m² = 2310 × 20
= ₹46200
hope this helps..!!
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