2
Q:
A) 8 : 47 pm | B) 6 : 40 pm |
C) 8 : 42 pm | D) 7 : 40 pm |
Answer: D) 7 : 40 pm
Explanation:
Explanation:
At 1 pm ... Distance between A and B = 2x3.5 = 7 kms
at 2 pm .....Distance between A and B = 7 + 3.5 - 1 = 9.5 kms
At 3 pm ....Distance between A and B = 9.5 + 3.5 - 2 = 11 kms.
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At 7 pm distance between A and B = 3 kms.
From 7 pm to 8 pm, speed of A = 3.5 kmph
speed of B = 8 kmph
Relative speed = 4.5 kmph
Time taken by B to meet A = 3/4.5 hrs = 30/45 hrs = 120/3 mins = 40 mins.
So meeting time is 7 : 40 PM.