Question

9. Five years ago, the average age of
P and Q was 15 yr. Average age of
P.Q R today is 20 yr. How old
will R be after 10 yr?
(a) 35 yr (b) 40 yr (C) 30 yr (d) 50 yr​

Answer 1

Answer:

I think answer will be option(d)

Answer 2

c

Step-by-step explanation:

let the age of p and q be x and y resp.

age of p 5 hears ago = (x-5)years

age of q s years ago = (y-5) years

average age = x+y-10/2

15*2=x+y-10

30=x+y-10

x+y=40..............(i)

let the age of r be z

A/Q

x+y+z/3=20

x+y+z=60

40+z=60.............(from i)

z=20

age of r after 10 yrs = z+10

=>30