Answer:
12pm
Step-by-step explanation:
54 miles in total. I thought of a straight line & the train is travelling to the end & back & that total miles is 54 .
so we divide 54 by 2 to find out how miles is it to go & to come back
54÷2 =27
27 miles to go & 27 miles to come back.
we know on the outgoing trip the train travelled 18 mph.
theres 27 miles
27÷18=1.5
it took 1.5 hours to travel 27 miles or one hour 30 mins .
on the return trip the train travelled 50 % faster .
50 percent of 18mph =9
9+18=27 mph
the return train is travelling 27mph & we know it has to travel only 27 miles
27÷27 =1
the return train would have taken an hour.
but they said there was a 30 minute delay so we have to factor all this in .
out going train 1 hour 30 mins , Return train 1 hour, Delay 30 mins
1 hour + 1 hour +30mins +30 mins =3 hours .
The train left 9 am & returned after 3 hours which is 12pm
