Here below is a maths test question for 15-year olds. Just give it a try:
A revolving door has three areas within a circular-shaped space. In one minute the door goes around 4 times. Two people can fit in each of the three door sectors.
What is the maximum number of people that can enter the building through the door in 30 minutes?
(The diameter of the circle = 200 cm, the Exit being located just opposite the Entrance).
Last edited by Tristar; 06-04-2015 at 08:31 AM.
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