The perimeter of a rectangle is 36 cm. If length is 10cm,then its area is ________cm2
Perimeter of the rectangle =36cm
⇒2×(length+breadth)=36
⇒length+breadth=362=18
It is given that length=10cm
Hence , 10+breadth=18
⇒breadth=18-10
⇒breadth=8cm
Now, Area of rectangle =length×breadth
=10×8=80cm2
Hence, area of rectangle = 80cm2