The mean of 10 numbers is 12.5. The mean of the first six numbers is 15 and the mean of the last five numbers is 10. Find the sixth number. 17 February 20215 March 2019 by Class of AchieversRead more
Triangle ABC is right angled at C. If p is the length of the perpendicular from C to AB and a, b, c are the lengths of the opposite angles A, B and C respectively then prove that 1/p^2 = 1/a^2 + 1/b^2. 22 October 201928 February 2019 by Class of AchieversRead more
While teaching about the Indian national flag, the teacher asked the students how many are there in a blue colour wheel? One student replied that it is 8 times the number of colours in the flag. While the other says the sum of the number of colour in the flag and number of lines in the wheel of the flag is 27. Convert the statements given by the students into linear equations of two variables and find the number of lines in the wheel. 6 January 202026 February 2019 by Class of AchieversRead more