SSLC (English Medium) Class 9 - Tamil Nadu Board of Secondary Education Question Bank Solutions for Mathematics

In the given figure, HT shows the height of a tree standing vertically. From a point P, the angle of elevation of the top of the tree (that is ∠P) measures 42° and the distance to the tree is 60 metres. Find the height of the tree

Find the T.S.A and L.S.A of the cube whose side is 8 m

Find the T.S.A and L.S.A of the cube whose side is 21 cm

Find the T.S.A and L.S.A of the cube whose side is 7.5 cm

If the total surface area of a cube is 2400 cm² then, find its lateral surface area

A cubical container of side 6.5 m is to be painted on the entire outer surface. Find the area to be painted and the total cost of painting it at the rate of ₹ 24 per m² 

The lateral surface area of a cube of side 12 cm is

If the lateral surface area of a cube is 600 cm², then the total surface area is

If the ratio of the sides of two cubes are 2 : 3, then ratio of their surface areas will be

In a week, temperature of a certain place is measured during winter are as follows 26°C, 24°C, 28°C, 31°C, 30°C, 26°C, 24°C. Find the mean temperature of the week

The mean weight of 4 members of a family is 60 kg. Three of them have the weight 56 kg, 68 kg and 72 kg respectively. Find the weight of the fourth member

In a class test in mathematics, 10 students scored 75 marks, 12 students scored 60 marks, 8 students scored 40 marks and 3 students scored 30 marks. Find the mean of their score

In a research laboratory scientists treated 6 mice with lung cancer using natural medicine. Ten days later, they measured the volume of the tumor in each mouse and given the results in the table

Find the mean

If the mean of the following data is 20.2, then find the value of p

The mean of a set of seven numbers is 81. If one of the numbers is discarded, the mean of the remaining numbers is 78. The value of discarded number is

The algebraic sum of the deviations of a set of n values from their mean is

The mean of a, b, c, d and e is 28. If the mean of a, c and e is 24, then mean of b and d is

If the mean of five observations x, x + 2, x + 4, x + 6, x + 8, is 11, then the mean of first three observations is

The mean of 5, 9, x, 17 and 21 is 13, then find the value of x

The mean of the square of first 11 natural numbers is