khuerta0037
khuerta0037 khuerta0037
  • 01-07-2020
  • Mathematics
contestada

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

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wegnerkolmp2741o
wegnerkolmp2741o wegnerkolmp2741o
  • 01-07-2020

Answer:

1.2 hours or 1 hour 12 minutes

Step-by-step 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

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aprilmonique0510 aprilmonique0510
  • 01-07-2020

Answer:

it took him 1 hour and 12 minutes

Step-by-step 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 Link

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