It takes 3 hour 15 minutes to fly from city a to city b at constant speed. Find how long the journey takes if A) the speed is 1×1÷2 times of the original speed and
B) if the speed is three-quarters of the original speed.

a) t= 2hours and 10 minutes

b) t=4hours and 20 minutes

v1t1=v2t2

{3 + i, 3 - i, 3, -1}

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