A car leaves Delhi at 11 a.m travelling at 50km/h . how fast would a second car be travelling if it leaves Delhi and hour later and overtake the first car at 5 p.m . on the same day
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for first car,
leave delhi at 11 am
at 5 pm time = 6 hr
speed = 50 km/hr
distance covered = speed * time
=> 50 * 6 = 300 km
for 2nd car,
leave one hr late i.e. 12 noon
at 5 pm time = 5 hr
distance if it overtakes 1st car = 300 km
speed = distance/time
=> 300/5 = 60 km/hr
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