Question

A girl swim 400m in still water and then returns to the initial point (from where she started) in 20 minutes determine the speed of the girl

Answer 1

Answer:

0.66 m/s

Step-by-step explanation:

Distance = 400m + 400m(returning) = 800m

Time (should be converted in sec) = 20 x 60 = 1200sec

Speed = Distance/Time

Therefore,

Speed = 800/1200 = 0.66m/s

(Hope this helps)

Answer 2

Answer:

speed = distance/time

going and returning distance=400+400=800

We know that speed = distance/time

converting minutes into sec 20×60=1200

800/1200

=0.66 m/s