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D യുടെ മുത്തച്ഛന്റെ പ്രായം D യുടെ പ്രായത്തിന്റെ വർഗ്ഗമാണ്. 6 വർഷം കഴി യുമ്പോൾ മുത്തച്ഛന്റെ പ്രായം D യുടെ പ്രായത്തിന്റെ 5 മടങ്ങായിരിക്കും. എങ്കിൽ D യുടെ പ്രായം എത്രയാണ് ?

A6

B8

C11

D5

Answer:

B. 8

Read Explanation:

D യുടെ മുത്തച്ഛന്റെ പ്രായം =X D യുടെ പ്രായം =Y X=YxY .....................(1) 6 വർഷം കഴിയുമ്പോൾ X+6=5(Y+6)................(2) put (1) in(2) YxY+6=5Y+30 YxY-5Y-24=0 Solving this Y=8


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