Question

Frank and his mom are planting vegetables in their garden. Frank has finished planting 8 rows of carrots so far and is planting new rows at a rate of 1 row per hour. His mom has finished 2 rows of tomatoes and will continue planting at 3 rows per hour. Once the pair get to the point where they have finished the same number of rows, they will take a break and decide what to plant next. How long will that take? How many rows will they each have completed?

Answer 1

It will take 3 hours. They will both have completed 11 rows.

Explanation:

1 row of carrots per hour = frank

3 rows of tomatoes per hour = frank's mom

right now, this is how many they have completed

frank - 8 rows

mom - 2 rows

1st hour

f - 9

m - 5

2nd hour

f - 10

m - 8

3rd hour

f - 11

m - 11