Question

At the beginning of the road, a tank truck was traveling full of 

water in the water tank, but it began to leak. You can assume 

that the fuel consumption of the truck is directly proportional 

to the weight it carries, and that the water flow (in the 

leakage) and the speed of the truck are constant for the whole 

journey. After traveling for miles, the truck leaked half of the 

water from the water tank and consumed half of the fuel tank. 

If the water tank was empty, the truck would have spent a 

sixth of the fuel tank, if it travelled the same distance and 

under the same conditions as above. 

Disregarding the fuel tank weight, what fraction of the fuel 

tank would be spent by the truck if there was no leak?  

Answer 1