q) one year ago the ratio of gauravs and sachins age was
6:7 respectively four years hence , the ratio would become
7: 8 how old is sachin ?
/// any one tell wheather my procedure ids correct or
wrong///
let gauravs and sachins age one year ago was 6X and 7X
respectively
four years hence gauravs age is =6X+4
four years hence sachins age is =7X+4
6x+4/7x+4=7/8
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Answer Posted / kaviarasan
Take 6:7 =》 6x : 7x ( one year
ago )
After four years ( (take that -1 year ago)+ 3 years = 4 years )
Their ages = 7:8
Let,
(6x+4) ÷ (7x+4) = 7÷8
(Cross multiplied)
6x ×8 =48x , 4×8=32
7x ×7=49x, 4×7=28
Let's take,
48x + 32 = 49x + 28
49 x - 48 x = 32-28
1x =4
Then sachin's age is now,
4 × 8 =32
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