Question

Trains to Portadown leave a train station every 28 minutes. Trains to Portrush leave a train station every 16 minutes train to Portadown and a train to Portrush both leave the train station at 8 am. When will a train to Portadown and a train to Portrush both leave the train station at the same time?

Answer 1

Answer:we need to find the lowest common multiple...

multiples of 14 are : 14,28,42,56,70,84,98,112,126,140,154

multiples of 20 are : 20,40,60,80,100,120,140

so the lowest common multiple is 140....so thats 140 minutes....= 2 hrs 20 minutes....from 8:00 = 10:20

so they will both leave at the same time of  10:20 a.m. <==

Answer 2

Answer:

the answer is the LCM (lowest common multiple) of the two numbers . we need to find the LCM  of 28 and 16

Step-by-step explanation:

here's how:-

we can find LCM in two ways-

first way is to write a few multiples of the  numbers and find the common one-

multiples of 28- 228,56,84,112,140

multiples if 16- 16, 32, 48, 64, 80, 96, 112

so as we see here,the lowest common multiple is 112. there fore the LCM  of 28 and 16 is 112 . so the trains will  leave at the same time after 112 minutes.

hope you foun this help ful

thank you