Q.

Measure of two quantities along with the precision of respective measuring instrument is :A=2.5m/s±0.5m/sB=0.10s±0.01sThe value of AB will be :

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a

(0.25±0.08)m

b

(0.25±0.5)m

c

(0.25±0.05)m

d

(0.25±0.135)m

answer is A.

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Detailed Solution

Let y = ABΔyy=ΔAA+ΔBBy=2.5×0.1=0.25Δy0.25=0.52.5+0.010.10⇒Δy=0.075=0.08(2SF)
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Measure of two quantities along with the precision of respective measuring instrument is :A=2.5m/s±0.5m/sB=0.10s±0.01sThe value of AB will be :