(a) Ratio of 81 to 108
\(=\frac{ 81}{108}\)
\(= \frac{3}{4}\)
\(= 3:4\)
(b) Ratio of 98 to 63
\(= \frac{98}{63}\)
\(= \frac{14}{9}\)
\(= 4:9\)
(c) Ratio of 33 km to 121 km
\(=\frac{ 33}{121}\)
\(= \frac{3}{11}\)
\(= 3:11\)
(d) Ratio of 30 minutes to 45 minutes
\(= \frac{30}{45}\)
\(= \frac{2}{3}\)
\(= 2:3\)
Complete the drawing shown in Fig. 9.14 to indicate where the free ends of the two wires should be joined to make the bulb glow