CBSE Class 10 Answered
mensuration
Asked by baidshryans | 26 Feb, 2009, 11:57: PM
Expert Answer
Area of a rectangular plot is 260 m sq
Let l be length & b be the breadth of the rectangular plot
⇒lb = 260...................(1)
Now, If its length decreases by 5m and the width increases by 2m, it becomea a square.
⇒l-5 = b +2
⇒l - b = 7
⇒l = b +7...................(2)
Now substituting the value of l in (1)
we get,
(b+7)b = 260
b2+7b -260 = 0
(b-13)(b+20) = 0
⇒ b = 13 or b = -20 (rejected)
Putting in equating 2 we get, l =20
Hence l = 20 & b =13
Answered by | 27 Feb, 2009, 10:19: AM
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