b) A pen costs twice as much as a pencil. If the cost find the cost of opens and 5 pencils. a) The breadth of a rectangular garden is two third of its length. If the perimeter of th garden is 200 m, find its length and breadth. (b) The breadth of a rectangular garden is one third of its length. If the perimeter of th garden is 160 m, find its length and breadth. (a) The The present age of a father is 4 years more than treble the age of his son. If the fath was 35 years old before five years, find the present ages of father and his son. (b) The present age of a father is 10 years old more than 5 times the age of his son if the father was 28years old before 2 years find the present age of father and son
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