If train A starts from Chennai towards Bangalore at 10 am and train B starts from Bangalore towards Chennai at 10 am

1. If train A starts from Chennai towards Bangalore at 10 am and train B starts from Bangalore towards Chennai at 10 am. If the speed of train A and train B is______kmph and 40 kmph and the distance between Chennai and Bangalore is 240 km, then the both trains meet each other in_______am/pm.

Which of the following options satisfies the two blanks in the question?

a)            80 kmph, 12 pm

b)            60 kmph, 12.40 pm

c)            120 kmph, 11.30 am

d)            50 kmph, 1.15 pm

Sol:

From option (A)

Time = 240/(80 + 40) = 2 hours

Meet each other=10 + 2=12 pm

This will satisfy the given condition

From option (B)

Time = 240/(60 + 40) = 2.4 hours = 2 hours 24 minutes

Meeting time = 10 + 2 hours 24 minutes = 12.24 pm

This will not satisfy the given condition.

From option (C)

Time = 240/(120 + 40) = 1.5 hours = 1 hours 30 minutes

Meeting time = 10 + 1 hours 30 minutes = 11.30 am

This will satisfy the given condition

From option (D)

Time = 240/(50 + 40) = 2 hours 40 minutes

Meeting time = 10 + 2 hours 30 minutes =

12.30pm

This will not satisfy the given condition.