A particle moves in a straight line with...

A particle moves in a straight line with a constant acceleration. It changes its velocity from `10 ms^-1` to `20 ms^-1` while passing through a distance `135 m` in `t` seconds. The value of `t` is.

1.8

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The correct Answer is:

`because` Average velocity xx time=distance
`therefore ((10+20)/(2)) (t)=135rArrt=9s`

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