A long train, half a kilometre long, is about to enter a long tunnel.
The tunnel is 10k long. If the speed of the train is 35kph, how long will it take for the entire train to pass through the tunnel - from the front of the train entering to the end of the train leaving the tunnel?
Hint: Don't forget the length of the train in the tunnel.
Answer: The train takes 18 minutes.
The front of the train has to initially travel 10k to leave the tunnel, and then a further 0.5k until the rear of the train has also left the tunnel - a total of 10.5k.
The train is travelling at 35kph and using Time = Distance ÷ Speed gives:
Time = 10.5 ÷ 35 = 0.3 hours.
Convert this to minutes:
0.3 x 60 = 18 minutes. QED.
What is represented by this BrainBat?
Z Z Z E
Z Z E Z
Z E Z Z
E Z Z Z
[Ref: ZCGX] Copyrighted.
Hint: Say what you see.
Answer: Diagonally - the E's are along the diagonal.
Using the BrainTracker grid below, how many words can you find? Each word must contain the central F and no letter can be used twice, however, the letters do not have to be connected. Proper nouns are not allowed, however, plurals are. Can you find the nine letter word?