200 applicants applied to volunteer at an international tennis tournament. 1/4
of the applicants were successful. However, of the successful applicants, 1/5
couldn’t make all the training sessions and were discounted.

How many were selected to help at the tournament?

the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

have a nice day!

55 degrees because 55+55=110 degrees