Question

Dad is 4 times as old as his son Jim. In 10 years, Dad's age will be 20 years more than twice Jim's age. How old is Jim?

Answer 1

15 years old..

Answer 2

How?

U see, here, it is given that dad = 4(jim)

after 10 yearsv .. dad's age will be (dad+10) and jim will be (jim + 10)

Put these values accordin to the situation given in the question .. i.e

dad+10 = 2(jim+10) + 20

=. 4(jim) + 10 = 2(jim+10) + 20..

Hope you understood. :)