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A man walk a certain distance at the rete of 5miles an hour and returns at the rate of 4miles an hour .if the total time that takes his 3hours and 9hrs minutes ,what is the total distance he walks.

Sagot :

5mi/1h
4mi/1h
= 9mi/2h

3hrs + 9hrs = 12hours
For every 2hours, he covered a distance of 9miles.
Now for 12 hours, how many distance in miles does he covered?
How many 2 hours in 12 hours?
That is 12/2 = 6
How many 9 miles are there in 6 hours?
That is 9 * 6 = 54

So therefore, he covered 54 miles.