Answers

2014-10-28T20:38:21+05:30
Present age of son-10 and present age of father -40 this is because :- let sons age be x fathers age is 4x after 5 yrs sons age- x+5 fathers age is 4x*3+5 so, present age- 4x*3+5= x+x+5 =12x+5=2x+5 = 12x-2x= 5-5 = 10x=0 so, x=10 so fathers age is 4*10= 40
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2014-10-28T20:46:41+05:30
Let the son's age be x
3(x+5)=4x+5
3x+15=4x+5
15-5=4x-3x
10=x
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