Answer:
I believe it is 16/7 or 2 2/7
20mps. Because velocity is the speed per unit. In this case it is going 20 m per second
36 of them did not have an umbrella because out of 11 people, 4 did not bring an umbrella.
It should come up as a notification. Check your messages or press “tutor” maybe even try reloading the page.