A man travelled a certain distance at the rate of 15 miles/hour and came back at the rate of 10 mile/hour. what is his average speed?
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Average speed is 15+10/2
= 25/2
= 12.5
So ,average speed is 12.5 miles / hour.
= 25/2
= 12.5
So ,average speed is 12.5 miles / hour.
Saumy11:
wrong
let distance be x. so total distance=2x. time taken to travel x distance=(x÷15). time taken to return=(x÷10). total time=(x÷15)+(x÷10)=(5x÷30)=(x÷6). average speed=total distance÷total time=(2x)÷(x÷6)=12mph. so average speed=12mph
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