P6 Math: Circles (Revolutions) and Distance between 2 Walls

The "Circle" question type below deals with Circumference ( revolutions ) and requires students to understand the relationship between the distance between the 2 walls and the number of revolutions that the "round object" has to make.



Such questions are common in Paper 2 of P6 exams.
Calculator usage is accepted.


The question below will randomize with different numbers every hour. 
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