A gentleman has two sons. The present age of the elder son is twice the present age of the younger son. Three years ago, the elder son’s age was three times the age of the younger son. Find the current age of the elder son.

Question: A gentleman has two sons. The present age of the elder son is twice the present age of the younger son. Three years ago, the elder son’s age was three times the age of the younger son. Find the current age of the elder son.Solution:ধরি,ছোট ছেলের বয়স = x বছরবড় ছেলের বয়স = 2x বছর3 বছর পূর্বে,ছোট ছেলের বয়স ছিলো = x - 3 বছরবড় ছেলের বয়স ছিলো = 2x - 3 বছরপ্রশ্নমতে,(2x - 3) = 3(x - 3)বা, 2x - 3 = 3x - 9বা, 3x - x = 9 - 3 বা, x = 6অতএব বড় ছেলের বয়স = (2 × 6) = 12 বছর