TANCET - XAT Math Problem : Ratio Proportion

Question

Two cogged wheels of which one has 32 cogs and other 54 cogs, work into each other. If the latter turns 80 times in three quarters of a minute, how often does the other turn in 8 seconds?

1. 48
2. 135
3. 24
4. None of these

Correct Answer 24 and correct choice is (3)

Explanatory Answer

Less Cogs => more turns and less time => less turns

	cogs	time	turns
A	54	45	80
B	32	8	?

Number of turns required = = 24 times

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