One year ago, the ratio of Gaurav' and Sachin's age was 6 : 7 respectively Four years hence , this raio would become 7 : 8. How old is Sachin ?  Options:
A) 34 years B) 36 years C) 37 years D) 38 years E) 39 years
Explanation :   Sol Let Gaurav's and Sachins ages one year ago be 6xand7x6xand7x 7ears respectively . Then   Gaurav's age 4 years hence = (6x+1) +4=(6x+5)(6x+1) +4=(6x+5) years   Sachin's age 4 years hence = (7x+1)+4=(7x+5)(7x+1)+4=(7x+5) years.   6X+5 / 7X+5 =7/8   â‡” 8(6x+5)= 7(7x+5)   â‡” 48x+40=49x+35   â‡” x=5   Hence , Schin's present age = (7x+1)(7x+1) = 36 years.   ANSWER IS 36 years
<result>B</result>
One year ago, the ratio of Gaurav' and Sachin's age was 6 : 7 respectively Four years hence , this raio would become 7 : 8. How old is Sachin ?