A boy is 5 year older than his sister how old are they if their ages are in ratio 4:3
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Let the age of the boy's sister=x
Age of the boy=x+5
Given ratio=4:3
=4:3=x+5:x
As product of mean =product of extremes
4x=3(x+5)
4x=3x+15
4x-3x=15
1x=15
x=15
Age of boy's sister=15
Age of the boy=15+5=20
Age of the boy=x+5
Given ratio=4:3
=4:3=x+5:x
As product of mean =product of extremes
4x=3(x+5)
4x=3x+15
4x-3x=15
1x=15
x=15
Age of boy's sister=15
Age of the boy=15+5=20
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