A championship swimmer swims 20 meters in 10 seconds. What is his speed? 200 m/s

0.5 m/s

20 m/s

2.0 m/s

2.0 m/s because to find how fast a body is moving we just have to find out his distance traveled by the time it took...so..u get 2.0 here's the step by step
Step1: 20 divided by 10 which is 2
Step2(check): A/B = CC x B = A...so if we multiply our answer(2) with the divisor(10) and it equals our divident(20) we are correct...and because 10 x 2 is 20 we know that 2 is indeed the answer of 20/10
Note: 2 and 2.0 are equal as 0 has no value in this case...

There is 240 red cars and there is 400 blue cars because 240/3=80 and 80*5=400

If the diameter is 8 than the radius is 4 because 2r or 2*radius equals the diameter. 4*2=8. 8/2=4.