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A horse is tied to a post by a rop. If t...

A horse is tied to a post by a rop. If the horse moves along a circular path always keeping the rope stretched and describes 88 metres when it as traced out `72^(@)` at the centre, the length of the rope is
(take `pi = (22)/(7)`)

A

70 मीटर

B

75 मीटर

C

80 मीटर

D

65 मीटर

Text Solution

Verified by Experts

The correct Answer is:
A
`theta =72^@ =72 xx pi/(180^@)`
`=(2pi)/5`
`:. theta = l/r` radian
`implies (2pi)/5 = 88/r`
`implies r = (88xx7xx5)/(2xx2)`
`implies r=70 m`
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