Question

11. The length of a rectangle is twice the breadth. If its perimeter is 60 m, then find its
length
12. The sides of a triangle are given byx, 2x + 2 and 3x - 2. If its perimeter is 30 cm,​

Answer 1

Answer:

l=2x

b=x

p=60m

p =2(l+b)

60=2x

x=30

Step-by-step explanation:

length =60

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Answer 2

Answer:

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Step-by-step explanation:

11. let the breast of text angle be x

so, length be 2x

perimeter of rectangle=2(l+b)

60= 2(2x+x)

60=4x+2x=6x

60/6=x

10=x

breadth is 10m and length is 20m

12. sides of triangle = x , 2x+2 , 3x-2

perimeter of triangle = s + s + s

30 = x+2x+2+3x-2

30 = 6x

x=5

sides of triangle are 5 , 12 , 13