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?
(A) $1 \frac{1}{4} \mathrm{~h}$
(B) $3 \mathrm{~h}$
(C) $5 \mathrm{~h}$
(D) $10 \mathrm{~h}$
(E) $12 \frac{1}{2} \mathrm{~h}$
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?
(A) $1 \frac{1}{4} \mathrm{~h}$
(B) $3 \mathrm{~h}$
(C) $5 \mathrm{~h}$
(D) $10 \mathrm{~h}$
(E) $12 \frac{1}{2} \mathrm{~h}$

## Solution 1

Since Steve plants ten trees every three minutes, he plants one tree every $\frac{3}{10}$ minute.

In order to plant 2500 trees, he will need $\frac{3}{10} \times 2500=750$ minutes or $\frac{750}{60}=12 \frac{1}{2}$ hours.

## Solution 2

Since Steve plants ten trees every three minutes, he plants 200 trees per hour.

In order to plant 2500 trees, he will need $\frac{2500}{200}=12 \frac{1}{2}$ hours.

ANSWER: (E)