Degree of temperature dropped in last 30 days = 15 degrees
∴ Degree of temperature dropped in last 30 days = \(\frac{15}{30}\)
= \(\frac{1}{2}\) degree
∴ Degree of temperature dropped in last 10 days = \(\frac{1}{2}\)×10
= 5 degree
Thus, 5 degree Celsius temperature dropped in 10 days.
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