AD is the median of . If O is the centroid and AO = 10 cm then OD is
5 cm
20 cm
10 cm
10 cm
A.
5 cm
The length of the two adjacent sides of a rectangle inscribed in a circle are 5cm and 12 cm respectively. Then the radius of the circle will be
6 cm
6.5 cm
8 cm
8 cm
The mean of 100 observations was calculated as 40. It was found later on that one of the observations was misread as 83 instead of 53. The correct mean is
39
39.7
40.3
40.3
A sphere of radius 5 cm is melted to form a cone with base of same radius. The height (in cm) of the cone is
5
10
20
20
The difference between compound interest and simple interest on a certain sum of money for 2 years at 5% per annum is ₹ 41/-. What is the sum of money?
₹ 7200
₹ 9600
₹ 16400
₹ 16400