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What is the maximum distance that the man can cover?

A man is riding a two-wheeler scooter on a challenging road. The tires/tyres wear out quickly on this road. He has 1 spare tire so 3 tires in total. Each tyre can go a maximum of 10 km. What is the maximum distance that the man can cover?

Correct answers: 139

The first user who solved this task is Maja Inkret.

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A Good Homily

Q: How long should a good homily be?
A: It should be like a woman’s skirt: long enough to cover the essentials and short enough to keep you interested.

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Hydrogen balloon

In 1783, the first manned voyage of a hydrogen balloon left Paris carrying Professor Jacques Alexander Cesar Charles and Marie-Noel Robert to about 600 m and landed 43 km away after 2 hours in the air. Robert then left the balloon, and Charles continued the flight briefly to 2700 m altitude, measured by a barometer. This hydrogen-filled balloon was generally spherical and used a net, load ring, valve, open appendix and sand ballast, all of which were to be universally adopted later. His hydrogen generator mixed huge quantities of sulfuric acid with iron filings. On 27 Aug 1783, Charles had launched an unmanned hydrogen balloon, just before the Montgolfiers' flight.[Image: from 1897 Encyclopedia Britannica]

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