Question

solve the following question with explanation.​

Answer 1

In the image given below, we are asked to find the length of the 'red' line which is the distance between centers.

The yellow line is 8 units radius of big circle, and the orange line is 3 units radius of small circle.

Clearly, red + orange = yellow,

The distance is 8 - 3 = 5 units.

Hence, the answer is 5 units.