Q. The following pie-­chart shows the study­ time of different subjects of a student in a day . Study the pie chart and answer the following questions.Instead of 10% , if the student spends 15% to study other subjects and the time is taken from the time scheduled to study mathematics and if he/ she used to study 20 hours per day , then the difference of time for studying mathematics per day is

A) 45 minutes

B) 30 minutes

C) 1 hour 30 minutes

D) 1 hour

✔ Correct Answer: 1 hour

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