Two cars start together in the same direction from the same place. the first goes with uniform speed of 10km/hr. the second goes at a speed of 8km/hr in the first hour and increases its speed by 1/2 km/hr each succeeding hours. after how many hours will the second car overtake the first, if both cars go non stop?
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When the difference of the distance will zero
First hour .. A run 10km
B run 8km
Diff = 2 km
Second hour
A run 10 km
B run 8.5 km
Diff = 1.5 km
Same for next 2 hour
Total run by A in 4 hour = 50
B = 8 + 8.5 + 9 +9.5 +10 = 45
Next 4 hour
A = 50+40=90
B = 45+10.5+11+11.5+12=90
It means after 9 hour .. B cross A
First hour .. A run 10km
B run 8km
Diff = 2 km
Second hour
A run 10 km
B run 8.5 km
Diff = 1.5 km
Same for next 2 hour
Total run by A in 4 hour = 50
B = 8 + 8.5 + 9 +9.5 +10 = 45
Next 4 hour
A = 50+40=90
B = 45+10.5+11+11.5+12=90
It means after 9 hour .. B cross A
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