The task is to generate the correct answer for a given math problem.

[Q]: Problem: the sum of ages of 5 children born 1 years different each is 30 years . what is the age of the elder child ?
[A]: 8


[Q]: Problem: in traveling from a dormitory to a certain city , a student went 1 / 5 of the way by foot , 2 / 3 of the way by bus , and the remaining 10 kilometers by car . what is the distance , in kilometers , from the dormitory to the city ?
[A]: 62


[Q]: Problem: 12 spheres of the same size are made from melting a solid cylinder of 8 cm diameter and 27 cm height . what is the diameter of each sphere ?
[A]:
6 cm