## Statistics- Exercise 14.1 – Class 10

A survey was conducted by a group of students as a part of their environment awareness program, in which they collected the following data regarding the number of plants in 20 houses in a locality. Find the mean number of plants per house. number of plants 0-1 2-4 4-6 6-10 8-10 10-12 12-14 number of… Continue reading Statistics- Exercise 14.1 – Class 10

## Some Applications of Trigonometry – Exercise – Class 10

continued part of Some Applications of Trigonometry -Class 10 10.Two poles of equal heights are standing opposite each other and either side of the road, which is 80 m wide. From a point between them on the road, the angles of elevation of the top of the poles are 60° and 30º, respectively. Find the height… Continue reading Some Applications of Trigonometry – Exercise – Class 10

## Some Applications of Trigonometry – Exercise 9.1-Class 10

A circus artist is climbing a 20 m long rope, which is tightly stretched and tied from the top of a vertical pole to the ground. Find the height of the pole, if the angle made by the rope with the ground level is 30 °. Solution: It can be observed from the figure that… Continue reading Some Applications of Trigonometry – Exercise 9.1-Class 10

## Linear equations in two variables – Exercise 3.1 – Class 10

1. Aftab tells his daughter, “Seven years ago, I was seven times as old as you were then. Also, three years from now, I shall be three times as old as you will be.” (Isn’t this interesting?) Represent this situation algebraically and graphically. Solution: Let the present age of Aftab be x and the present… Continue reading Linear equations in two variables – Exercise 3.1 – Class 10

## Areas Related to Circles – Exercise 12.1 – Class 10

The radii of two circles are 19 cm and 9 cm respectively. Find the radius of the circle which has circumference equal to the sum of the circumferences of the two circles. Solution: Radius (r1) of 1st circle = 19 cm Radius (r2) or 2nd circle = 9 cm Let the radius of 3rd circle… Continue reading Areas Related to Circles – Exercise 12.1 – Class 10