On a sunny day, a 6-foot red kangaroo casts a shadow that is 7 feet long. The shadow of a nearby eucalyptus tree is 42 feet long. Find the height of the tree.

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, -7)

- lines r and s and lines t and u must be parallel

he has 140 chickens because he has 10 times more chickens than ducks and he has 14 ducks so 14*10=140