allery6 বছৰত এগৰাকী মাতৃ সন্তানৰ বয়সৰ দুগুণ হ’ব; 6 বছৰ আগতে তাইৰ চাৰিগুণ আছিল। মা এতিয়া?
A28 বছৰ
B36 বছৰ
C30 বছৰ
D32 বছৰ
Answer & Solution
Correct answer: C. 30 বছৰ
চৰ্তসমূহে M = 2C + 6 আৰু M = 4C − 18 দিয়ে, গতিকে
C = 12 আৰু M = 30 বছৰ।
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