App Logo

No.1 PSC Learning App

1M+ Downloads
Three friends A. B and C start running around a circular stadium and complete a single round in 8, 18 and 15 seconds respectively. After how many minutes will they meet again at the starting point for the first time?

A12

B6

C8

D15

Answer:

B. 6

Read Explanation:

The required time will be the LCM of 8, 18 and 15 which is 360 sec or 6 minutes.


Related Questions:

Cubban Park is in:
The age of father 10 years ago was thrice the age of his son. Ten years hence, father's age will be twice that of his son. The ratio of their present ages is:
A father said to his son, "I was as old as you are at the present at the time of your birth". If the father's age is 38 years now, the son's age five years back was:
After 5 years, the age of a father will be thrice the age of his son, whereas five years ago, he was 7 times as old as his son. What is the present age of son?
Twelve years ago, Rekha's age was 2/5 of that of her sister. The ratio of Rekha's and her sister's present age is 3: 4. What is the total of their present ages?