A circular park of radius 21 m has a road 7m wide all around outside it.find the area of the road
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4
hye
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A circular park of radius 21 m has a road 7m wide all around outside it.
area of the circle without the path
=> radius = 21 cm
area of circle = π²*radius
= 22/7*21*21
= 1386 m²
there is 7 m in both sides
=> radius of whole park = 21 +7 = 28m
area of circle [including path ] π²*radius
= 22/7*28*28
= 2464 m²
area of path =
area of circle [including path ] - area of the circle without the path
=>2464 - 1386
=>1078m²
area of path = 1078m²
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hope it helps
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A circular park of radius 21 m has a road 7m wide all around outside it.
area of the circle without the path
=> radius = 21 cm
area of circle = π²*radius
= 22/7*21*21
= 1386 m²
there is 7 m in both sides
=> radius of whole park = 21 +7 = 28m
area of circle [including path ] π²*radius
= 22/7*28*28
= 2464 m²
area of path =
area of circle [including path ] - area of the circle without the path
=>2464 - 1386
=>1078m²
area of path = 1078m²
=======================================
hope it helps
sarthakthegreat:
it is wrong you took the wrong formula idiot
it is pi×r×r not 2×pi×r.2xpixr is the formula for perimeter
Answered by
1
area of the path=area of the property-area of the circle
let the area of the path be X
X=22/7×28×28- 22/7×21×21
X=2464-1386
X=1078 square meters ans
let the area of the path be X
X=22/7×28×28- 22/7×21×21
X=2464-1386
X=1078 square meters ans
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