A Cement Mixture Calls for 40 Pounds of Cement for 2

Multiple Choice

A cement mixture calls for 40 pounds of cement for 2 gallons of water. What is the ratio of cement to water?

A) $\frac { 40 } { 1 }$
B) $\frac { 10 } { 1 }$
C) $\frac{2}{1}$

D) $\frac { 20 } { 1 }$
E) $\frac { 21 } { 1 }$