Question

Jimmy spent 1 hour planting 15 trees. How long would it take to plant 18 such trees?

Answer 1

it took him 1 hour and 12 minutes

Explanation:

well you divide 60 (cuz an hour is 60 minutes) by 15 and u get 4

then u multiply 4 by 3 and u get 12

then u add 1 hour and 12 minutes

hope this helped :)

Answer 2

1.2 hours or 1 hour 12 minutes

Explanation:

We can use ratios to solve

1 hour x hours

------------ = ------------

15 trees 18 trees

Using cross products

1*18 = 15x

Divide by 15

18/15 = x

1.2 hours

1.2 * 60 minutes = 72 minutes

1 hour 12 minutes