Andre is running in an 80-meter hurdle race. There are 8 equally-spaced hurdles
on the race track. The first hurdle is 12 meters from the start line and the last
hurdle is 15.5 meters from the finish line. Estimate how far the hurdles are from
one another.

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

-2 is the right