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A body starting from rest is accelerated...

A body starting from rest is accelerated uniformly for 15 s. If `x_1, x_2, x_3` are the distance travelled in 5s, 10 s and 15 s respectively, then `x_1:x_2:x_3=`

A

`1:2:3`

B

`1:1:1`

C

`1:3:5`

D

`1:3:9`

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