Moving along the edge of time
Geometry
Level
1
The large hand of a big clock is 35 cm long. How many cm does its extremity move in 9 minutes? Answer to three decimal places.
The answer is 32.987.
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1 solution
in 60 minutes it moves 2 x 22/7 x 35=220 cm and so in 9 minutes it moves 220/60 x 9=33 cm (taking Pie=22/7)