1.

The sum of the current ages of Usha and Sandhya is 50 years. Before 5 years the ratiowas 5:7. What is the difference in their current age?(A) 5 Years (B) 10 Years (C) 15 Years (D) 30 Years​

Answer»

age of an individual PERSON will increase by 1 with every YEAR.

Every year, sum of increased age of 5 people will be 5 years.

Every 5 years, sum of increased age of 5 people will be 5x5 = 25 years.

Based on above understanding,

sum of age of 5 people as of CURRENT year will be = sum of age of 5 people before 5 years + sum of increased age of 5 people in 5 years = 50 + 25 = 75 and after 5 years from current year, it will be 75 + 25 = 100 years.
Hope it’s helps



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