0Question:
Arun, Barun and Kiranmala start from the same place and travel in the same direction at speeds of 30 km/hr, 40 km/hr and 60 km/hr respectively. Barun starts two hours after Arun. If Barun and Kiranmala overtake Arun at the same instant, how many hours after Arun did Kiranmala start?
1) 3
2) 3.5
3) 4
4) 4.5
5) 5
Answer:
speed ---30---40---60 (HP)
Whereas time t---(t-2) -----???,
Since speed is in HP, so
Time Must be in AP,
So ans is Time is 4 hrs.
