Brain Teasers
Truck Driving
Once upon a time Mad Ade had a job as a truck driver. One day he had to leave his depot and drive his truck to the river dock to pick up supplies for his boss. At 4:05 PM, one-fifth of the way to the dock, he passes his favourite Kebab shop "The Sweaty Chef". At 4:15 PM, one-third of the way, he passes his favourite shop, "Honest Ron's Second Hand Underpants Repair Shop and Swaparama". At what time did Mad Ade reach the dock, assuming he didn't stop for a Kebab or a look around Honest Ron's?
Answer
5:05 PMAt 4:05 PM, Mad Ade passes the Kebab shop, one-fifth of the way to the dock. Also, at 4:15 PM, he passes the Underpant shop, one-third of the way. Thus, he travels 2/15 (1/3 - 1/5) of the distance in 10 minutes.
At 4:15 PM, Mad Ade has already travelled 1/3 of the distance. Thus 2/3 of the way is remaining, which can be travelled in
= ( (2/3) * 10 ) / (2/15)
= 50 minutes
At 4:15, Mad Ade was at Honest Ron's Underpants shop, and remaining way will take 50 more minutes. Hence, Mad Ade will reach the docks at 5:05 PM.
Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments hidden to avoid spoilers.
Follow Braingle!