Question

A Ferris wheel has a diameter of 42 feet. It rotates 3 times per minute. Approximately how far will a passenger travel during a 5-minute ride?

132 feet
659 feet
1,978 feet
3,956 feet

Answer 1

so circle with radius 21 has circumference is 2pi*r and that is how much we will travel in one turn, we go 3 turns per min for five mins we have 15 turns.

can you get it from here?

Answer 2

no I don't

Answer 3

oh wait I get it

Answer 4

Now i gotta figure it out for 5 min ride?

Answer 5

which I dont know how to do

Answer 6

@samirahdanyel what did you get for the circumference of the circle?

Answer 7

I didn't do that yet.

Answer 8

use 2*pi*r

pi = 3.14 (approx)
r = 21 since the diameter is 42 and 42/2 = 21

Answer 9

I got 42 pi

Answer 10

so one full cycle has the person traveling `42pi` feet

in one minute the wheel rotates 3 times, so how many feet does this person go in one minute?

Answer 11

Do i multiply

Answer 12

or something like that

Answer 13

yes

Answer 14

3*42pi = ??

Answer 15

or you can think of it as 42pi+42pi+42pi but that is a bit more cumbersome

Answer 16

I got 126 pi

Answer 17

yep, so in one minute, the person travels `126pi` feet

Answer 18

now multiply that by 5 to get the total distance they travel in 5 minutes

Answer 19

i got 630 pi

Answer 20

me too, so that is the answer in terms of pi

Answer 21

630pi means 630*pi

replace pi with 3.14

Answer 22

okay so i do 630 (3.14) *5

Answer 23

no just 630*3.14

Answer 24

the 5 is already built in

Answer 25

okay

Answer 26

I got 1979.20337

Answer 27

If you use pi = 3.14, then you should get

630*pi = 630*3.14 = 1,978.2

Answer 28

oh i didnt put it in parantheses