Instructions

The following pie chart shows the hourly distribution in a day (in degrees) of all the major activities of a student. Moreover, a day has 24 hours.

Question 91

If he spends the time in games equal to the home work and remains constant in other activities, then the percentage decrease in time of sleeping:

Solution

The time spent in playing games and in doing homework corresponds to 30° and 45° respectively.

If the time spent in playing games is equal to that spent on doing homework, then there should be an increase of 15° in the time spent in games.

If this 15 ° is obtained by decreasing the time spent in sleeping (with the other activities remaining constant), 

The percentage decrease in the time spent in sleeping = $$\ \frac{\ 15^0}{120^0}\times\ 100$$

= $$12.5^0$$

B is the correct answer.


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