## S-7-30-The median of the following dats is 525. Find the value of x and y if the total frequencry is 100.

The median of the following dats is 525. Find the value of x and y if the total frequencry is 100. Draw a less than type and a more than type ogive from the given data. Hence, obtain the median marks from Read More …

## S-7-29-A tent is the form of a cylinder of diameter 4.2 m and height 4 m, surrounding by a cone of equal base and height 2.8 m. find the capacity of the tent and the cost of canvas for making the tent at 100 per sq. m.

A tent is the form of a cylinder of diameter 4.2 m and height 4 m, surrounding by a cone of equal base and height 2.8 m. find the capacity of the tent and the cost of canvas for making the tent Read More …

## S-7-28-Two circular flower beds lie on two sides AB and CD of a square lawn ABCD of side 56 m. If the centre of each circular flower bed is point of intersection O of the diagonals of square lawn. Find the sum of the areas of the lawn and flower beds.

Two circular flower beds lie on two sides AB and CD of a square lawn ABCD of side 56  m. If the centre of each circular flower bed is point of intersection O of the diagonals of square lawn. Find the sum Read More …

## S–7-27-Prove that (sin A +cos A/sin A -cos A)+ (sin A -cos A/sin A + cos A) =2/sin² A cos ² A

Prove that (sin A +cos A/sin A -cos A)+ (sin A -cos A/sin A + cos A) =2/sin² A cos ² A

## S-7-26-BE and CF are medians of triangle ABC right angled at A. Prove that 4(BE² + CF²) = 5BC²

BE and CF are medians of triangle ABC right angled at A. Prove that 4(BE² + CF²) = 5BC² ANS:

## S-7-25-Coach of a cricket team buys one bat and 2 balls for Rs. 300.Later he buys another 2 bates and 3 balls of the same kind for Rs. 525. Represent this situation algebraically and solve it by graphical method. Also find out that how much money coach will pay for the purchase of one bat and one ball.

Coach of a cricket team buys one bat and 2 balls for Rs. 300.Later he buys another 2 bates and 3 balls of the same kind for Rs. 525. Represent this situation algebraically and solve it by graphical method. Also find out Read More …

## S-7-24-Divide 3x² -x² -3x + by x-1 – x² and verify the division algorithm.

Divide 3x² -x² -3x + by x-1 – x² and verify the division algorithm.

## S-7-23-Prove that √2 is an irrational number.

Prove that √2 is an irrational number. Or Use Euclid’s division lemma to show that the cube of any positive integer is of the form 9m, 9m+1 or 9m+8

## S-7-22-A box contains 30 discs which are number 1 to 30. If one disc is drawn at random from the box. Find the probability that it hears – (i) A two digit number (ii) A perfect square number.

A box contains 30 discs which are number 1 to 30. If one disc is drawn at random from the box. Find the probability that it hears – (i) A two digit number (ii) A perfect square number.

## S-7-21-The distribution below shows the pocket money during a days of 60 employees in an office. Find the median pocket money of the employees.

The distribution below shows the pocket money during a days of 60 employees in an office. Find the median pocket money of the employees. A survey conducted on 20 households in a locality by a group of students resulted in the following Read More …

## S-7-20-Find the co- ordinate of the circumcentre of the triangle whose vertices are (8,6), (8,-2) and (2, -2). Also its circum radius.

Find the co- ordinate of the circumcentre of the triangle whose vertices are (8,6), (8,-2) and (2, -2). Also its circum radius.

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