In a day, the factory
has the availability of not more than 42 hours of machine time and 24 hours of
craftsman’s time (i) What number of rackets and bats must be made if  the factory is to work
at full capacity (ii) If the profit on a racket and on a bat is Rs 20 and Rs 10 respectively, find
the maximum profit of the factory when it works at full capacity 4