The circumferences of the front wheel and the rear wheels of a tricycle are 120 cm and 90 cm respectively. Before beginning to ride the tricycle, Ruth marks the points where the tyres touch the ground as A and B respectively on the front and the rear wheels. How many revolutions do the front and rear wheel make when both A and B touch the ground again simultaneously? (a) 6, 8 (b) 3, 4 (c) 9, 12 (d) 1, 4
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Step-by-step explanation:
correct option: c) 9,12
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