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Q.

In an experiment to measure the height of a bridge by dropping stone into water underneath, if  the error in measurement of time is 0.1s at the end of 2s, then what will be the error in estimation of height of bridge?

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a

2.12 m

b

1.96 m

c

0.98 m

d

0.49 m

answer is B.

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Detailed Solution

h=12gt2=129.84=19.6 ∆hh=2∆tt=20.12=0.1
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