Grandma is removing weeds from her garden. She estimates that there are 250 weeds in the garden at the moment, and she can remove weeds

Question

at a rate of 5 per minute. At this rate how many minutes (m) will it take Grandma to only have 30 weeds remaining in the garden?

Equation:
Solution:
Answer in words:

Answer 1

Let's use the equation:

m = (250 - 30) / 5

First we subtract the number of weeds she wants to have remaining (30) from the number of weeds she currently has (250). This gives us the number of weeds she needs to remove (220).

Then we divide the number of weeds she needs to remove (220) by the rate she can remove weeds (5 per minute). This gives us the number of minutes it will take her to remove all the weeds except the 30 remaining weeds.

m = 220 / 5 = 44

So it will take Grandma 44 minutes to only have 30 weeds remaining in the garden.