What was their average speed?
Two youngsters were running as hard as they could. They averaged 6 miles per hour, and then had to rest. On the way back, they averaged only 4 miles per hour for the same distance. Not counting resting time, what was their average speed?
Click here for the solution
The correct answer is 4.8, not 5, miles per hour. The answer is obtained by dividing the distance covered by the time elapsed, and any distance will do. Take a 12-mile run, for instance. That will take them two hours out and three hours back. It, therefore, took them five hours to travel 24 miles.
more riddles
On what day and date?
Debbie promised to take her daughter Becky shopping on the day before the fourth day after the day after tomorrow. If today is Sunday the 3rd. On what day and date will Becky take Debbie shopping?There is no way to know when Becky will take Debbie shopping....
How long would it take him?
A cyclist rode a mile in three minutes with the wind, and returned in four minutes against the wind. Assuming that he always applies the same force to the pedals, how long would it take him to cycle a mile on a windless day?If he can cycle a mile in three...
Who is the subject of the painting?
A man, looking at a painting, says to himself: "Brothers and sisters have I none, but that man's father is my father's son." Who is the subject of the painting?The mans own son.more riddlesDonec rutrum congue leo eget...