What will be the perimeter of a triangle having two sides equal to 30cm and the third side as 40 cm?

We know that the triangle has two sides equal to 30cm and the third side as 40 cm.
Formula used:

The lengths of sides of the triangle are 30 cm , 30 cm and 40 cm.
Now the perimeter of the triangle,
Hence, the perimeter of the triangle is 100 cm.
Therefore, option 4 is correct.