Question

five year ago the average of P and Q was 15 years average of P and Q and R is 20 years how old will R be after 10 years​

Answer 1

Answer:

30 yr

Step-by-step explanation:

Description for Correct answer:

According to the question,

=>P+Q2=20

=>P+q=40

and P+Q+R3=20

=>P+Q+R=60

On solving Eqs. (i) and (ii), we get

R = 20 yr

Therefore, Age of R after 10 yr from now

= 20 + 10 = 30 yr