Question

Grant can row 6 miles in 36 minutes. Arianna can row 3,520 yards in 20 minutes. In miles per hour, how much faster does Grant row than Arianna?

Answer 1

1 mile is 1760yds
Grant's speed is \[\frac{ 1mile }{ 1\min }\]

Answer 2

okay

Answer 3

3520yd divide by 1760yd you get 2miles

Answer 4

so arianna's speed is
\[\frac{ 1mile }{ 10mins } = \frac{ 0.1mile }{ 1\min }\]

Answer 5

okay

Answer 6

would equal up to be 29.3

Answer 7

so we convert them mile/min to mph

Answer 8

okay

Answer 9

multiple both grant and arianna speed by 60 to get the units to mile per hour. Then:
Grant's speed - Arianna's speed

Answer 10

I got 29.3 for Arianna

Answer 11

What's your calculation steps?

Answer 12

5.156.8

Answer 13

No... Arianna's speed is in yards, you need to convert it to miles

Answer 14

so convert 29.3 to yards

Answer 15

I meant mile

Answer 16

Arianna row 3520 yards in 20mins
1 mile is 1760 yards
\[\frac{ 3520yd }{ 1760yd } = 2 miles\]

Answer 17

okay

Answer 18

6195200

Answer 19

\[\frac{ 2miles }{ 20mins } = \frac{ 1mile }{ 10mins } = \frac{ 0.1miles }{ 1\min }\]

Answer 20

40

Answer 21

40?

Answer 22

I got 40 somehow

Answer 23

ok we have both Grant and Arianna speed in miles per min (check the working above) now we convert them to miles per hour

Answer 24

okay

Answer 25

Think I made a typo the top again....at Grant's speed should be
\[\frac{ 0.1667miles }{ 1\min }\]

Answer 26

Multiply Grant's speed by 60 you should get 10miles per hour
Multiply Arianna's speed by 60 you should get 6miles per hour

Answer 27

okay

Answer 28

10-6=4 which is the answer

Answer 29

okay