A, B and C start swimming in a pool simultaneously from the same end. To complete 10 laps, A takes 10 minutes, B takes 6 minutes and C takes 6 minutes. What is the ratio of speeds A:B:C?  Answers.
A) 3:5:5 B) 12:15:20 C) 5:4:3 D) 4:6:5 E) 12:15:25
The slowest one is A, then comes B and the fastest one is C. So, the the ratio of speeds A:B:C must be in ascending order. Eliminate options C, D, and E.   A's speed (distance)/(time) = 10/10= 
<gadget id="calculator">10/10</gadget>
<output>1</output>
1 lap per minute= 3 laps in 3 minute;   B's speed (distance)/(time) = 10/6= 5/3 lap per minute = 5 laps in 3 minutes;   C's speed (distance)/(time) = 10/6 = 5/3 lap per minute = 5 laps in 3 minutes/   Therefore, the the ratio of speeds A:B:C is 3:5:5.   3:5:5nswer: 3:5:5.
<result>A</result>
A, B and C start swimming in a pool simultaneously from the same end. To complete 10 laps, A takes 10 minutes, B takes 6 minutes and C takes 6 minutes. What is the ratio of speeds A:B:C?