Asked by mat

a coast guar ship left a port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?
Answered by PsyDAG
4(30) + 30x = 90x

Solve for x.
Answered by I. Kan
Finding by ratio as follow

ship 30 mph
total distant in 4 hours is 30*4=120 mph

helicop 90 mph

so ratio
MPH DISTANT MPH DISTANT
120 4 90 X

120*X = 360
X = 360/120
X = 3

SO X = 4-3
X = 1 HOUR THE HALI WILL CATCH THE SHIP

YOURS EQUATION 4(30) + 30x = 90x IS NOT CORRECT COZ THE SOLUTION LL BE 120=90X-30X
120=60X
60X=120
X=120/60
X=2 MEANS THAT THE THE SHIP IS HALF SPEED OF HALI WHICH IS NOT CORRECT.
There are no AI answers yet. The ability to request AI answers is coming soon!