A) 1.9 sec
B) 2.0 sec
C) 2.1 sec
D) 2.2 sec
Correct Answer: A
Solution :
Suppose the distance between two fixed points is d then \[t=\frac{d}{v}\text{also }v\propto \sqrt{T}\Rightarrow \frac{{{t}_{1}}}{{{t}_{2}}}=\frac{{{v}_{2}}}{{{v}_{1}}}=\sqrt{\frac{{{T}_{2}}}{{{T}_{1}}}}\] Þ \[\frac{2}{{{t}_{2}}}=\sqrt{\frac{303}{283}}\]\[\Rightarrow \]\[{{t}_{2}}\]= 1.9 sec.
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