Question

The perimeter of a rectangle is 28cm. and area is 45 cm2. find the length and breadth?
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Answer 1

Answer:

l=9cm

Step-by-step explanation:

A=wl

P=2(l+w)

There are 2 solutions forl

l=P

4+1

4P2﹣16A=28

4+1

4·282﹣16·45=9cm

l=P

4﹣1

4P2﹣16A=28

4﹣1

4·282﹣16·45=5cm

Answer 2

Step-by-step explanation:

Perimeter of rectangle=28cm

l+b=14

l=14-b

Area of the rectangle =45cm²

lb=45

14b-b²=45

b²-14b+45=0

b=14±✓196-180/2

b=14±4/2

breadth=9,5cm

length=5,9cm