Q205
The circumferences of the front and rear wheels of a bicycle are 3.5 m and 3 m respectively. If the vehicle is moving at a speed of 15 m/sec, the shortest time in which both the wheels will make a whole number of turns is :
A.
1.4 seconds
AnswerB.
2.1 seconds
C.
4 seconds
D.
6.4 seconds
Answer: Option A
Solution
Answer: Option A
Solution:
Time taken by front wheel to complete one revolution :Time taken by rear wheel to complete one revolution :
∴ Required time :