Question
Sleeping time of a python in a $24$ hour clock is represented by the shaded portion in Fig. The ratio of sleeping time to awaking time is .

Answer

 By observing above figure, we have sleeping time of python $=18h$
Awaking time of python $= (24 - 18) = 6h$
Ratio of sleeping time to awaking time = $\frac{18\text{h}}{6\text{h}}$
$=\frac{3}{1}$ [On dividing numerator and denominator by $6] = 3 : 1$
The number in the box is $18.$

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