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Optimal Motorbike Travel Option (Posted on 2022-12-27) Difficulty: 2 of 5
Darren has 16 motorbikes with a tank that has a capacity to go 100 miles (when the tank is full).

→ All the motorbikes are initially fully fueled.
→ Each start from the same point.
→ Each bike has a rider on it.

Using these 16 motorbikes optimally, determine the maximum distance that Darren can travel.

Note:
It is not necessary for all the bikers to reach at that final point.

See The Solution Submitted by K Sengupta    
Rating: 4.0000 (1 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
re: Solution | Comment 6 of 7 |
(In reply to Solution by Larry)

In fact, Larry is suggesting something similar to the way in which rocket stages are utilised. 


The optimal solution works as follows:

After 100/17 miles, each tank is 16/17 full. Split the tank contents of bake #16 among the other 15 bikes. These bikes 15 each now have a full tank. 

After another 100/16 miles, each tank among the remaining 15 bikes is 15/16 full. Split the tank contents of bike #15 among the remaining 14 bikes. These 14 bikes each now have a full tank. 

And so on. 

The distance covered is 100 miles * ( 1/17 + 1/16 + ...+ 1/1). In decimal this is just over 337 and one quarter miles. 

Now, how is Larry going to get home for lunch?

  Posted by FrankM on 2022-12-27 15:05:02
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