Ram said to his sister that 10 years before he was twice of her age & after 5 years his age will be

M4maths Previous Puzzles

23 Jan 2013 Age Problem

Ram said to his sister that 10 years before he was twice of her age & after 5 years his age will be 25 % more than her age. Product of their present ages will be

OPtion

1) 50
2) 100
3) 150
4) 200
5) 250
6) 300
7) 350
8) 400
9) 450
10) None of these

Solution

y-10=2(x-10)
y-2x=-10(1)
y+5=1.25(x+5)
y+5=1.25x+6.25
y-1.25x=1.25 (i)
y-2x=-10 (ii)
.75x=11.25
x=15
y=20
x*y=300

Correct Option: 6 Best Solution (0)