Question

The distance of 180 km between Delhi and Agra is covered by John in 2 hours and by Jill in 3 hours. If John starts from Delhi towards Agra at 8 a.m. and Jill starts from Agra towards Delhi at 9 a.m., at what time will they meet?

Answer 1

Speed of john is 90km/hr and speed of jill is 60km/hr.
First one john travelled 90 km.
So remaining distance between them is 90km. Let they meet at t hr after 9:00 am.
Distance travelled john in t time =90t
Distance travelled jill in t time = 60t
90t +60t = 90
150t= 90
t = 90/150
t= 3/5= 36 minutes
So they meet at 9:36 a.m