Fill in the Blanks

Short Answer

Fill in the blanks. $\begin{array} { l } \hline \text { Pulley A } \quad\quad\quad\quad\quad\quad { \text { Pulley B } } \\\begin{array} { | l | l | l | l | } \hline \text { Diameter } & \mathrm { rpm } & \text { Diameter } & \mathrm { rpm } \\\hline 24 \mathrm {~cm} & 48 & 48 \mathrm {~cm} & \\\hline 9 \mathrm {~cm} & & 6 \mathrm {~cm} & 90 \\\hline\end{array}\end{array}$