Question

the perimeter of a rectangular card is 60 CM. find the length and breadth which are in the ratio 2:1

Answer 1

Perimeter of rectangular card =60 cm
perimeter of rectangle =2(L+B)
= 2(2x+x) = 60
= 4x+2x=60
= 6x=60
= x=60/6
= x=10
length= 2×10=20
breadth=1×10=10

Answer 2

Let, The length and breadth of rectangular card be 2x:1x
We know, Perimeter of rectangle=2 (l+b)
So, 60 =2 (2x+1x)
=> 60 =2 (3x)
=> 60 =6x
=> x =60/6
=> x =10cm
Now, length = 2×10=20cm
breadth =1×10=10cm