#140 Drum roll
Aiming to mix the contents of a rusty drum without getting dirty, Mr Bodger has an idea. The drum is lying on its side, so he wants to place one end of an old plank, which is 5 metres long, on the side of the drum, then walk towards the drum while holding onto the plank. In this way, he will use the plank to roll the drum (without any slipping with respect to both the ground and the plank) to mix its contents. He will stop walking when he reaches the drum.
In fact, Mr Bodger has many drums that require similar treatment, and he is a lazy sort of fellow, so he consults his friend Mr Hasty about how far he will need to walk to mix each drum. After giving the problem his undivided attention for 10 seconds, Mr Hasty assures him that as the plank is 5 metres long, and the radius of each drum is 0.5 metres, then the maximum distance he will need to walk each time is 4.5 metres.
This is incorrect, but by how much is Mr Hasty out?
#139 BLOXO cubes
Solution
The six yellow four-packs and three single blue blocks will all fit. The blues are placed along the diagonal of the 3脳3 box.
Quick quiz #128
1 The coxa and trochanter are found in which part of an arthropod?
2 Which of these periods in the lunar geological timescale came first: the Imbrian, the Copernican or the Eratosthenian?
3 For how many years did the Human Genome Project run?
4 The term 鈥渕onotreme鈥� refers to an area of some animals鈥� anatomy. What area is it?
5 Monel alloys are primarily made up of nickel and which other element?
Answers
1 The leg
2 The Imbrian
3 13 (from 1990 to 2003)
4 The cloaca, the single orifice for the digestive, reproductive and urinary tracts
5 Copper