Question

Given the speeds of each runner below, determine who runs the fastest. Noah runs 8 feet per second. Jessica runs 358 feet in 34 seconds. Adam runs 1 mile in 444 seconds. Liz runs 592 feet in 1 minute.

Answer 1

Answer: Adam

Explanation: Here we just need to find the speed of each runner in a single unit of expression to compare them.

we know,
`Speed = (Distance)/(time)`

For,

Noah:

Distance= 8 feet

time= 1 sec.

∴ speed = 8 fps

Jessica:

Distance= 358 feet

time= 34 sec.

∴ speed =
`(358)/(34)` = 10.5294 fps

Adam:

Distance= 1 mile = 5280 feet

time= 444 sec.

∴ speed =
`(5280)/(444)` = 11.892 fps

Liz:

Distance= 592 feet

time= 1 min. = 60 sec.

∴ speed =
`(592)/(60)` = 9.867 fps

From the above results we find that Adam is the fastest runner.

Answer 2

Adam

Step-by-step explanation:

Noah: 8 feet per second

Jessica: 358 feet / 34 seconds = 10.53 feet / second (just divide the feet / seconds.

Adam:

1 mile = 5280 feet

Adam runs 5280 / 444 seconds = 11.89 feet per second

Liz:

1 minute = 60 second.

Liz runs 592 feet / 60 seconds = 9.87 feet / second

Answer: Adam