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A planet revolves about the sun in ellip...

A planet revolves about the sun in elliptical orbit. The arial velocity `((dA)/(dt))` of the planet is `4.0xx10^(16) m^(2)//s`. The least distance between planet and the sun is `2xx10^(12) m`. Then the maximum speed of the planet in `km//s` is -

A

`10`

B

`20`

C

`40`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
c
`2m(dA)/(dt)=mvr`
`2xx4xx10^(16)=v_(max)xx2xx10^(12)`
`v_(max)=40 km//s`
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