A) 4 min
B) 6 min
C) 5 min
D) 8 min
Correct Answer: B
Solution :
First case, \[\frac{61-59}{4}=K\left[ \frac{61+59}{2}-30 \right]\] ?..(i) Second case, \[\frac{51-49}{t}=K\left[ \frac{51+49}{2}-30 \right]\] ?..(ii) By solving equation (i) and (ii) we get t = 6 min.You need to login to perform this action.
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