A) 200
B) 210
C) 250
D) 240
Correct Answer: C
Solution :
Radius of wheel = 70 cm \[\therefore \] Distance covered in 1 revolution \[=2\times \frac{22}{7}\times 70=440\,cm\] Now, Speed \[=66\text{ }km/hr\] \[=\frac{66\times 1000\times 100}{60}cm/\min =110000\,cm/\min \] \[\therefore \] Number of revolutions \[=\frac{110000}{440}=250\]You need to login to perform this action.
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