a toothed wheel of diameter 50 cm is attached to a smaller..., Area, General Mathematics

Question:A toothed wheel of diameter 50 cm is attached to a smaller wheel of diameter 30 cm. How many revolutions will the smaller wheel make when the larger one makes 15 revolutions ?

/98

+ AnswerC

+ ExplanationDistance moved by toothed wheel in 15 revolutions

    `= (15 xx 2 xx 22/7 xx 25) cm.`

Distance moved by smaller wheel in 1 revolultion

   `= (2 xx 22/7 xx 15) cm.`

:. Required number of revolutions

`= (15 xx 44/7 xx 25 xx 7)/(44 xx 15)`

`= 25`

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Question:A toothed wheel of diameter 50 cm is attached to a smaller wheel of diameter 30 cm. How many revolutions will the smaller wheel make when the larger one makes 15 revolutions ?

A 18

B 20

C 25

D 30

C