Question

Ming's team cleans 3 animals per hour after an oil

spill. Nina's team cleans 6 animals per hour. How
much longer does it take Ming's team to clean
12 animals?

Answer 1

Answer: 2 hours

Explanation:

`Mingn's \ team \\\\ 3\ animals -1 h \\\\ 12 \ animals -? h \\\\ ?=(12)/(3) =\boxed{4 \ hours}`
`Nina's \ team \\\\ 6\ animals -1 h \\\\ 12 \ animals -? h \\\\ ?=(12)/(6) =\boxed{2 \ hours}`

`\rm Difference: \\\\4-2=\bf 2 h`

Answer 2

• 2 hours longer

Explanation:

Time Ming's team needs:

• 12/3 = 4 hours

Time Nina's team needs:

• 12/6 = 2 hours

The difference:

• 4 - 2 = 2 hours