Question

The length and breadth of a rectangle are 10 m and 400 cm respectively. Its perimeter is _____________m?

Answer 1

Answer:

4000 is the answer of this question

Answer 2

Answer:

Given:-

The length and breadth of a rectangle are 10m and 400cm respectively. Its perimeter is ________ m ?

To Find:-

The perimeter of a rectangle.

Note:-

●》The perimeter of rectangle = 2 × ( length + breadth )

●》If length and breadth unit ( cm, m ) are not same then we can't find the perimeter so we should take it into equal unit Like - cm , cm and m, m.

Solution:-

Length = 10m , Breadth = 400 cm ( here unit is not same as you can see )

☆ According to note second point and we know that~

▪︎$1 m = 100 cm$

▪︎$10 m = 10 × 100 cm$

▪︎$10 m = 1000 cm$

So now, length = 1000 cm , breadth = 400 cm ( now unit is same )

__________________

Now, perimeter~

☆ According to note first point~

▪︎$Perimeter \ \ of \ \ a \ \ rectangle = 2 × ( length + breadth )$

▪︎$Perimeter \ \ of \ \ a \ \ rectangle = 2 × ( 1000 cm + 400 cm )$

☆After doing bracket calculations~

▪︎$Perimeter \ \ of \ \ a \ \ rectangle = 2 × 1400 cm$

☆After doing multiplication~

▪︎$Perimeter \ \ of \ \ a \ \ rectangle = 2800 cm$

Answer:-

Hence, the perimeter of a rectangle = 2800 cm

:)