Question

a car making a trip travel the first 0.5 hours at 50 miles per hour and the last 10 minutes at 60 miles per hour. what is the car's average speed for the entire trip?

Answer 1

Total distance travelled by the car is

       d = [(0.5 h) ( 50 miles / h) ] + [ ( 10 minute )(1 h / 60 min) ( 60 miles / h) ]

           = 25 miles + 10 miles

            = 35 miles

           =56327.04 m

average speed

    v = d /t

       = ( 56327.04 m ) / [ ( 0.5 x 3600 s ) + (10 x 60 s )]

       = 23.46 m/s