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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 limit 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=dt=13.84.0=3.45 ms-1Δvv=Δdd+ΔttΔv=Δdd+Δttv=0.213.8+0.34(3.45)=0.3 m/s(v±Δv)=(3.45±0.3)ms-1
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