a train leaves LA at 2:00 and heads north at 50 mph. if the next train leaves the station 3 hours later and heads north at 60 mph at what time will the second train catch up with to the first train

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

what level of math? also i don't need to be paid if i can you.