Question

.during the during five successive hours a car covers 65 km 72 km 68km 70 km and 55km.find the average speed of the car per hour.?​

Answer 1

Answer:

in first hour the car drives 65, in second 72, in third 68, in fourth 70,and in fifth 55km

therefore speed of car in firat hour=65÷1=65km/h

in second hour=72÷1=72km/h

in third hour=68÷1=68km/h

in fourth hour=70÷1=70km/h

in fifth hour=55÷1=55km/h

then average=(65+72+68+70+55)km/h÷5

=270km/h÷5

=54km/h

therefore th average of speed of car is 54km/h