Difference between revisions of "1998 CEMC Gauss (Grade 7) Problems/Problem 12"
Coolmath34 (talk | contribs) (Created page with "== Problem == Steve plants ten trees every three minutes. If he continues planting at the same rate, how long will it take him to plant 2500 trees? <math>\text{(A)}\ 1 \dfrac...") |
Coolmath34 (talk | contribs) (→Solution) |
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Steve plants 10 trees every 3 minutes, meaning he plants one tree every <math>\frac{3}{10}</math> minute. | Steve plants 10 trees every 3 minutes, meaning he plants one tree every <math>\frac{3}{10}</math> minute. | ||
| − | To plant 2500 trees, he needs <math>\frac{3}{10} cdot 2500 = 750</math> minutes or <math>\frac{750}{60} = 12\dfrac{1}{2}</math> hours. | + | To plant 2500 trees, he needs <math>\frac{3}{10} \cdot 2500 = 750</math> minutes or <math>\frac{750}{60} = 12\dfrac{1}{2}</math> hours. |
The answer is <math>\text{(E)}.</math> | The answer is <math>\text{(E)}.</math> | ||
-edited by coolmath34 | -edited by coolmath34 | ||
Revision as of 14:22, 29 January 2021
Problem
Steve plants ten trees every three minutes. If he continues planting at the same rate, how long will it take him to plant 2500 trees?
Solution
Steve plants 10 trees every 3 minutes, meaning he plants one tree every 
minute.
To plant 2500 trees, he needs 
minutes or 
hours.
The answer is 
-edited by coolmath34
