Subject
Quantitative Aptitude
Topic
Areas & Volumes
The diameter of the driving wheel of a bus is 140 cm. How many revolution, per minute must the wheel make in order to keep a speed of 66 kmph ?
The diameter of the driving wheel of a bus is 140 cm. How many revolution, per minute must the wheel make in order to keep a speed of 66 kmph ?
ক)
150খ)
250গ)
350ঘ)
550Explanation
Circumference = No.of revolutions * Distance covered Distance to be covered in 1 min. = (66 X1000)/60 m = 1100 m. Circumference of the wheel = 2 x (22/7) x 0.70 m = 4.4 m. Number of revolutions per min. =(1100/4.4) = 250.Related questions
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