Question

five years ago, the average age of P and Q was 15 years. Average age of P, Q and Ris 20 years. How old will R be at 10 years​

Answer 1

Answer:

10

Step-by-step explanation:

p-5+q-5=30

p+q=40

p+q+r=60

r=20

how old r be at 10??

10