Respuesta :
Answer:
 60 days
Step-by-step explanation:
The least common multiple of 6, 4, and 10 is the product of the unique factors ...
 6 = 2·3
 4 = 2²
 10 = 2·5
The LCM is 2²·3·5 = 60.
All of them will meet at the swimming pool again in 60 days.