4) A boat traveled 288 kilometers each way downstream and back. The trip downstream took 12 hours. The trip back took 72 hours. Find the speed of the boat in still water and the speed of the
cument.

288 divided by 12 = 24         24 + 72 = 96

Step-by-step explanation:

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