Q .     An athlete completes one round of circular track of radius `R` in `40 sec`. What will be his displacement at the end of `2 min 20 seconds` ?

EAMCET 2010
A

`7R`

B

`2R`

C

`2piR`

D

`7piR`

HINT

Find the location of the athlete after `2 min 20 sec`
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