Question

Two boats leave the jetty at the same time.one of them returns to the jetty every 25 minutes and the second one returns every 30 minutes.
When will the boats next be at the jetty at the same time

Answer 1

Step-by-step explanation:

150 mins or 2 hrs 30 mins Step-by-step explanation: This is simply the LCM ( lowest common multiple) therefore, you find all the prime factors of 25 using a tree diagram resulting in 5^2 and 30 which will be 2 x 3 x 5. Then you multiply all the factors together and you will get 5 x 5 x 2 x 3 = 150 so.... the answer is after 150 mins or 2 hours and 30 minutes