Answers

2015-06-27T13:30:42+05:30
Linear speed = 1.05 cm/s

thus, in 1 second, it goes 1.05cm
in 1 second, it covers (630/60) = 6 degrees

 \frac{6}{360} \times 2 \pi  \times l = 1.05\\\\ \Rightarrow l =  \frac{1.05 \times 360}{6 \times 2 \pi } \\\\ \Rightarrow l =  10.03\ cm

Length of seconds hand is 10.03cm

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