Question

The length of a rectangle is 3cm more than its breadth and its perimeter is 50cm.what is the sum of its lenght and breadth .

Answer 1

Answer:

Let the breadth=x

length=x+3

perimeter of rect. =2(l+b)

50cm=2(x+3+x)

50cm=2(2x+3)

50cm=4x+6

50cm-6cm=4x

44cm=4x

44cm/4=x

11cm=x(breadth)

11cm+3cm=14cm(length)

Sum of length nd breadth is=14cm+11cm=25cm

Answer 2

Hi , your answer
Let the shorter side of triangle =x cm
The other side of the triangle =(x+5)cm
The area of reactangle
(x+5)(x)=150
⇒ x
2
+5x−150=0
⇒ (x+15)(x−10)=0
⇒ either x=−15 or x=+10
Since the side cannot be negative
Therefore the value of c=−15 is negligible
When x=10cm, then the other side =10+5=15cm
Hope it is helpful
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