A car travels 60 miles at a speed of 60 miles per hour. It then travels another 60 miles at a speed of 40 miles per hour. What is the car's average speed for this trip
2006-10-31 04:10:11 · 4 answers · asked by maconheira 4 in Science & Mathematics ➔ Physics
total time taken = 60/60 + 60/40= 1 + 1.5= 2.5 hrs
total distance = 60 + 60 = 120 miles
so average speed = 120/2.5 = 48 miles/hr
2006-10-31 04:30:19 · answer #1 · answered by Mech_Eng 3 · 0⤊ 0⤋
48 mph. 60 miles at speed of 60mph = 1hour trip time
60 miles at speed of 40mph =60/40=1.5 hour trip time
Total of 120 miles in 2.5 hours
120miles/2.5 hours = 48 mph
2006-10-31 12:34:24 · answer #2 · answered by Brian 5 · 0⤊ 0⤋
50
2006-10-31 12:17:59 · answer #3 · answered by edward m 4 · 0⤊ 0⤋
take the total distance of the trip, and divide it by the total time of the trip
2006-10-31 12:18:09 · answer #4 · answered by Kutekymmee 6 · 0⤊ 0⤋