Question
Area of sector of a circle whose radius is 21 cm, is
327.25 cm 2 . Find the angle subtend by arc at the center of circle. (Use π = 22/7)Solution
Area of sector = (A/360) X π X radius 2 , where 'A' is the angle subtended by arc at the centre
So, (A/360) X (22/7) X 21 2 Â = 327.25
Or, (A/360) X 1,386 = 327.25
Or, 'A' = 85
A student has to secure 40% marks to pass an examination. He gets 150 marks and fails by 30 marks. What are the maximum marks?
A man invested all his current month income in starting of a new business in which he spends 40% in advertisement 20% of remaining in furniture 10% of r...
In a city, the number of persons travelling by bike is 80% the number of persons travelling by metro. The number of persons travelling on foot is 70% th...
- Riya got 40% more marks in Economics than in Business Studies. If her average score in Economics, Business Studies, and Accounts is 95, and she scored 105 ...
- A number is first increased by 25% and then decreased by 25%. The overall change in number is:
The total strength of school A is 20% more than that of school B. In school A and B, out of total number of students, 30% and 40% respectively are girls...
In a city, the number of persons travelling by bike is 52.5% the number of persons travelling by metro. The number of persons travelling on foot is 60% ...
If two successive discounts of 20% and 12% are applied, what would be the equivalent single discount?
A person sells each package of snacks for Rs. 13 each. On Monday, he sold 100 packages which was 32 more than that on Tuesday but 21 less than that on W...
The marks scored by a boy in three subjects are in the ratio 3 : 5 : 7. Boy scored an overall aggregate of 70% in the exam. If the maximum marks in each...
