A) 2.5 s
B) 10 s
C) 20 s
D) 5 s
Correct Answer: B
Solution :
[b] \[\frac{50-49.9}{t}=K\left( \frac{50+49.9}{2}-30 \right)\] ....(i) \[\frac{40-39.9}{t}=K\left[ \frac{40+39.9}{2}-30 \right]\] ?(ii) From equations (i) and (ii), we get\[\operatorname{t}\approx 10 s\].You need to login to perform this action.
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