A car covers the first one third of a distance x at a speed of 10 km per hour the second one third at the speed of 20 km per hour and the last one third at the speed of 60 km per hour determine the average speed of the car over the entire distance x
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Answer:
hi here is ur answer
Explanation:
Let the total distance travelled be x km Then total time taken =
10
x/3
+
20
x/3
+
60
x/3
=
30
x
+
60
x
+
180
x
=
180
6x+3x+x
=
180
10x
=
18
x
hrs Then average speed = =
Totaltimetaken
Totaldistancetravelled
=
x/18
x
km/hr = 18 km/hr
may be it helps you
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