If a person swims 10ft in 2 1/2 min where will he be in 6 min

Question

If a person swims 10ft in 21/2 min how  far does he swim in 6 min

Answer 1

One way is to find the ft/min rate and multiply by 6:

 

10 ft in 2 1/2 mins = 10/( 2 1/2) ft/min = 10/(5/2) = 4 ft/min

 

If he goes 4 ft/min for 6 mins then he goes

4(6) = 24 ft

 

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Alternatively using proportions:

 

10:2.5::x:6

2.5x = 10(6)

x = 60/2.5

x = 24

 

 

10/2.5 = x/6 

solve for x

x = (10/2.5)(6) = 24 ft

 

x = 24

 

3 ways to set this up.. All giving answer of 24 feet