Question

Across

3. An equation of the form ax + by +c =0 where a,b,c are real and a,b cannot be zero simultaneously and x,y are variables , is

called a --------------- equation in two variables x,y.

4. Value of the variable x which when substituted in the equation , makes two sides of the equation equal, is called ---------------

of the equation.

5. First natural number is -------------(in words).

6. Every linear equation in two variables has an ------------- number of solutions.

Down

1. A symbol which takes various numerical values is known as a -------------------

2. Addition of one with one gives -------------.

19. Solve the following linear equation:

(3−2)

4

-

(2+3)

3

=

2

3

- t

20. The dimensions of a cuboid are in the ratio 2: 3 :4 and its total surface area is 5200 cm2

. Find the volume of the cuboid​

Answer 1

Step-by-step explanation:

Across

3. Linear

4.

5. One

6. Infinite

Down

1. Variable

2. Two

Question no. 20

h = 2x

b = 3x

l = 4x

TSA = 2(lb + bh + hl)

5200 cm² = 2(4x*3x + 3x*2x + 2x*4x)

5200 = 2(12x² + 6x² + 8x²)

5200 = 2(26x²)

5200/2 = 26x²

2600/26 = x²

100 = x²

√100 = x

10cm = x

h = 2x = 2*10 = 20cm

b = 3x = 3*10 = 30cm

l = 4x = 4*10 = 40 cm

I hope it helps.