A wheel that has 6 cogs in meshed with a larger wheel if 14 cogs. When the smaller wheel has made 21 revolutions, the number of revolutions made by the larger wheel will be

A wheel that has 6 cogs in meshed with a larger wheel if 14 cogs. When the smaller wheel has made 21 revolutions, the number of revolutions made by the larger wheel will be

A 5

B 8

C 10

D 9

Solution

Correct Answer: Option D

মনে করি ,বড় চাকাটি ঘোরে =x বার
শর্তমতে ,6× 21=x× 14
বা, x=(6× 21)/14
বা,x=9