Agirl rides her bike at 15 m/s for 20 s. how far does she travel in that time?
300m
how fast would the girl in the previous problem have been traveling if she had covered the same distance in 11 seconds?

300 m

27.27 m/s

Explanation:

Use the formula:

Distance = speed × time

1.

Speed of the girl riding her bike = 15 m/s

Time taken = 20 s

Distance covered in the given time with the given speed:

Distance = 15 m/s × 20 s = 300 m

2.

Distance covered = 300 m

time taken = 11 s

Speed = Distance ÷ time taken

∴ Speed of the girl would be = (300 m)÷ (11 s) = 27.27 m/s

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when jerome paddle in flowing river towards east the net speed of jerome will increase

so the net speed of jerome will be given as

now the speed of paul will be same as it is given as he is running on the ground

so

so here we can say since the speed of jerome is more so he will win the race

now as we know the distance so the time difference is given as

so jerome will reach first and the time difference will be 203.55 s or 3.4 min