If two circles have radii 10 cm and 15cm and they touch each other. Find the distance between their centres.

Two circles of radii 13 cm and 5 cm touch internally each other. Find the distance between their centres:

Two circles having radii 3.5cm and 4.8cm touch each other internally. Find the distance between their centres.

Two circles of radii 5.5cm and 4.2cm touch each other externally. Find the distance between their centres.

Two circles of radii 5.5cm and 4.2cm touch each other externally. Find the distance between their centres.

Two circles having radii 3.5 cm and 4.8 cm touch each other internally. Find the distance between thir centres.

Two circles having radii 3.5 cm and 4.8 cm touch each other internally.Find the distance between their centres.

Two circles of radii 5 cm and 3 cm touch each other internally. Then the distance between their centres.

Two circles of radii 7 cm and 4 cm touch each other externally. Then the distance between their centres.

Two circles of radii 5.5 cm and 4.2 cm touch each other externally. Find the distance between thir centres.