A starts from a place at 11.00 am and travels at a speed of
4 kmph , B starts at 1.00 pm and travels with speeds of 1
kmph for 1 hr , 2 kmph for the next hr , 3 kmph for the
next hr and so on. At wht time will B catch up with A ?
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Answer Posted / vikram mandal
A goes by (11am-1pm)2h 8km.
A covers 3hours=B covers 1hour.
so,A covers the distance of 10hours=40km
where B covers the distance of 8hours=36km
now,speed of B's is 9km/h.
where speed of A's is 4km/h.
within next 1hour A will cover 44km.
so,(44-36)km=8km.to cover this distance B needs time=(8/9)h=.88h
So,B catch up to A same day to 08.54p.m.
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