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Q.

A body travels uniformly a distance of  (13.8 ± 0.2) m in a time (4.0 ± 0.3) s. The velocity of the body within error limits is :

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a

(3.45 ± 0.2) ms-1

b

(3.45 ± 0.3) ms-1

c

(3.45 ± 0.4) ms-1

d

(3.45 ± 0.5) ms-1

answer is B.

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Detailed Solution

v=st=13.84= 3.45 v=st ∆vv=∆ss+∆tt=0.213.8+0.34=2138+340 ∆v =(2138+340) x 3.45= 0.3
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