Class 12th

Let k, y and z be the cost per kg of onion, wheat and rice. Then, we form a system of equations as follows

         4k + 3y + 2z = 60

         2k + 4y + 6z = 90

         6k + 2y + 3z = 70

In matrix form we can write,

AX = B

= 0 - 3 (-30) + 2 (-20)

= 90 - 40

= 50 ≠ 0.

∴ The system has a unique solution.

The cost of onion, wheat and rice per kg are? 5? 8 and? 8 respectively.

Kindly go through the solution

The given system of eqⁿ can be written in matrix form as

          AK = B

∴ x= 2, y = 1 and z = 3 .

The given system of equation can be represented in matrix form as AK = B

The given system of eqⁿ can be written in matrix form as AK = B.

The given system of solution in matrix form is AK = B.

The given system of equation in matrix form is

          AK = B

This is a Multiple Choice Questions as classified in NCERT Exemplar

Answer- d

Explanation- as we know that Ev = E_o/ $\sqrt[]{2}$  so E₀= Ev $\sqrt[]{2}$ so net voltage is 220 $\sqrt[]{2}$ V

The given system of eqⁿ can be written in matrix form as

       AK = B