Problema Solution
oN A RECENT RIP, bILL'S CAR TRAVELED 20 MPH FASTER ON THE first 32 miles than it did on the remaining 154 miles. The total time for the trip was 4 hours. Find the speed of Bills car on the the first part of the trip.
Answer provided by our tutors
let
v + 20 = the speed on the first 32 miles
v = the speed on the remaining 154 miles, v>0
t = 4 hr the total time of the trip
since speed = distance/time follows time = distance/speed
32/(v + 20) + 154/v = 4
by solving we find:
v = 44 mph
click here to see the step by step solution of the equation:
44 + 20 = 64 mph
the speed of Bill's car on the first part of the trip is 64 mph.