ten years ago raj was half of kumar in age if the ratio of their present age is 3:4,what will be the sum of their present ages?
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let a and b be the current ages of raj and Kumar
a+b=?
(b-10)/2=a-10
a=b/2+5
a/b=3/4
4a=3b
4 (b/2+5)=3b
2b+20=3b
b=20
a=20/2+5
=15
sum of ages =35
a+b=?
(b-10)/2=a-10
a=b/2+5
a/b=3/4
4a=3b
4 (b/2+5)=3b
2b+20=3b
b=20
a=20/2+5
=15
sum of ages =35
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