1find the ratio of 40 paise to rs 2

2. 4 m to 45 cm

3. 450g to 800g

4. 24: 56

1.2rs=200 40:200 1:5

2:4m=400cm

3.450g=450000mg 800g=800000mg

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b