পাঁচ বছৰ আগতে এগৰাকী মাতৃৰ বয়স তেওঁৰ পুত্ৰৰ বয়সৰ তিনিগুণ আছিল; এতিয়া তেওঁলোকৰ বয়সৰ সমষ্টি 50। পুত্ৰৰ বয়স হ'ল
A10
B12
C20
D15
Answer & Solution
Correct answer: D. 15
বয়স m আৰু s হ'লে: m - 5 = 3(s - 5) আৰু m + s = 50 ৰ পৰা পোৱা যায় s = 15।
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