Pat planned to place patio stones in a rectangular garden that has dimensions $15 \mathrm{~m}$ by $2 \mathrm{~m}$. If each patio stone measures $0.5 \mathrm{~m}$ by $0.5 \mathrm{~m}$, how many stones are needed to cover the garden?
(A) 240
(B) 180
(C) 120
(D) 60
(E) 30
Pat planned to place patio stones in a rectangular garden that has dimensions $15 \mathrm{~m}$ by $2 \mathrm{~m}$. If each patio stone measures $0.5 \mathrm{~m}$ by $0.5 \mathrm{~m}$, how many stones are needed to cover the garden?
(A) 240
(B) 180
(C) 120
(D) 60
(E) 30

## Solution

The garden has an area of $30 \mathrm{~m}^{2}$.

Each patio stone has an area of $(0.5)(0.5)=0.25 \mathrm{~m}^{2}$.

Pat will need $\frac{30}{0.25}$ or 120 patio stones.

ANSWER: (C)