Respuesta :

Answer:

In 10 seconds it can swim 50 meters.

Step-by-step explanation:

Since 20 meters is 4 seconds, 40 meters is 8 seconds, and 10 meters is 2 seconds. In total 10 seconds. 50 meters.

Answer:

50m

Step-by-step explanation:

=20=4

x=10

Cris cross method

=20×10=4x

200=4x

x=200/4

x=50m