SOLUTION: The length of rectangle is 20cm.if its breadth 1 by 4 shorter than its length .find its area and perimeter?

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Question 770121: The length of rectangle is 20cm.if its breadth 1 by 4 shorter than its length .find its area and perimeter?
Answer by tommyt3rd(5050) About Me  (Show Source):
You can put this solution on YOUR website!
please explain "1 by 4 shorter than its length"