The total age of A, B and C is 90 years. Ten years ago the ratio of their ages was 1 : 2 : 3. What is the present age of B?

A 40 years
B 30 years
C 20 years
D 18 years

Correct Answer: 30 years

Hints: ধরি, 10 বছর আগে এদের বয়স ছিলো x, 2x, 3x x + 10 + 2x + 10 + 3x + 10 = 90 6x + 30 = 90 6x = 90 - 30 6x = 60 x = 10 B's present age = (2x + 10) = 30 years
Bissoy MCQ
#গণিত #অনুপাত-সমানুপাত (Ratio-Proportion) #Similar to Bank Ltd #Anti Corruption Commission - Asst. Director - 12.04.2013

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