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The circumference of the front and rear wheels of a bicycle are 3.5 cm 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 turns is

(a)

1.4 sec

(b)

2.1 sec

(c)

4 sec

(d)

6.4 sec



Question ID - 50590 | SaraNextGen Top Answer

The circumference of the front and rear wheels of a bicycle are 3.5 cm 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 turns is

(a)

1.4 sec

(b)

2.1 sec

(c)

4 sec

(d)

6.4 sec

1 Answer
127 votes
Answer Key / Explanation : (a) -

Time taken by front wheel to complete 1 revolution =  sec.

 

Time taken by rear wheel to complete 1 revolution =  sec.

 

Req. time = LCM of  and  = sec.

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