The perimeter of a square is thrice the perimeter of a rectange. If the perimeter of the square is 84 cm and the length of the rectangel is 8 cm, what is the difference between the breadth of the rectangle and the sidce of the square?
Perimeter of the square = 84 cm Perimeter of the rectangle = 28 cm Perimeter of the rectangle = 2(1 + b) or, 2(8 + b) = 28 cm or, b = 14 - 8 = 6 cm. Breadth of the rectangle = 6 cm Side of the square = $84 \over 4$ = 21 cm Difference = 21 - 6 = 15 cm
4 women and 12 children together take four days to complete a piece of work. How many days will four children alone take to complete the piece of work if two women alone can complete the piece of work in 16 days?