Question

the length of a boundary of a rectangle whose length is 20 metre and breadth is 10 metre is equal to 30 m right or rong​

Answer 1

Answer:

60

Step-by-step explanation:

perimeter is 2(l+b)

look.

in a rectangle we have 2 lenghts and 2 breadths, right?

so you should add 10+10+20+20 because you need to find the whole of the rectangle

you can just draw the rectangle and write down the measure of the lines right beside which will make it easier for you to find the perimeter.

then you can add them easily without making a mistake.

hope it helps.