Question
a boat travels 60 miles to an island and 60 miles back again. The return trip is 3 mph slower than the speed on the way out. The total time of the trip took 9 hours. Find the speed going to the island and the speed of the return trip.
Answers
Anonymous
let the rate took when travelling to the island be r. So,the rate for return trip is r-3.
time taken to the island=60/r
time taken back from island=60/r-3
60/r+60/r-3 =9=total time
find L.C.D ,
so after solving,u get r=15mph
speed to the island=15mph
speed from island =15-3=12mph
u can check ur answer.
time taken to the island=60/r
time taken back from island=60/r-3
60/r+60/r-3 =9=total time
find L.C.D ,
so after solving,u get r=15mph
speed to the island=15mph
speed from island =15-3=12mph
u can check ur answer.