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Anonymous:
is the ans is 2πr
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after completing half of its revolution,it will cover a distance of a SEMICIRCLE.and it's diameter will be it's displacement.
so.
distance covered=2πr/2
displacement=2r
Distance = 2 pi R
Displacement = 2 R
Distance = pi R... Sorry
why sorry my answer is right
absolutely right
yep... i am sorry for myself
ok buddy, no problem
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distance = 360 /2
= 2π/2=π
Displacement = r +r= 2r
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