Question

Anil, Sunil, and Ravi run along a circular path of length 3 km, starting from the same point at the same time, and going in the clockwise direction. If they run at speeds of 15 km/hr, 10 km/hr, and 8 km/hr, respectively, how much distance in km will Ravi have run when Anil and Sunil meet again for the first time at the starting point?

• A. 4.2
• B. 5.2
• C. 4.8
• D. 4.6

Answer 1

Answer: (C)

4.8

Answer 2

The correct answer is (C): $4.8$
Time taken by Anil and Sunil meet at the starting point = $LCM \bigg(\frac{3}{15},\frac{3}{10}\bigg)=\frac{3}{5}$
Distance run by Ravi in $\frac{3}{5}$ hours = $\bigg(\frac{3}{5}\bigg)×8 = \frac{24}{5}$ = $4.8$ $km$