Question

A circle has a radius of 12 cm. If the radius of the circle is increased by a factor of 7, how many times larger will the circle's circumference be?

Answer 1

Answer:

The circumference is also 7 times larger

12 cm radius :2*pi*12= 75.43

12*7=84

84cm radius: 2*pi*84= 528

To check if its indeed 7 times larger: 528/75.43 and you'll get 7

If youre looking for the difference between the two: 528-75.43= 452.57