Bihar board class 10th chapter : - 3 (Gillu -Mahadevi Verma) // BY AYUSH

Class 10 science bio ch 3 lec 1

Most important question class 10 chapter 4 Quadratic equation

The sum of first 6 terms of an arithmetic progression is 42. The ratio of its 10th term to its 30th term is 1:3 . Calculate the first and 13th term of an AP.

The sum of the first six terms of an arithmetic progression is 42. The ratio of the 10th term to the 30th term of the A.P. is (1)/(3) Calculate the first term and the 13th term.

The sum of first six terms of an arithmetic progression is 42. The ratio of its 10th term to its 30th term is 1:3. Calculate the first and the thirteenth term of the A.P.

a. Estimate the force with which a karate master strikes a board, assuming that hand's speed at the moment of impact is 10.0ms^(-1) , decreasing to 1.00ms^(-1) during a 0.002 s time interval of contact between the hand and the board. The mass of his hand and arm is 1.00 kg . b Estimate the shear, assuming this force it exerted on a 1.00 cm thick pine board that is 10.0 cm wide. c. If we maximum shear stress a pine board can support before breaking is 3.60xx10^(6)N//m^(2) , will the board break?

You have studied in Class IX, (Chapter 9. Example 3), that a median of a triangle divides it into two triangles of equal areas. Verify this result for ∆ ABC whose vertices A(4, – 6), B(3, –2) and C(5, 2).