allery6 বছরে একজন মা তার সন্তানের বয়সের দ্বিগুণ হবেন; 6 বছর আগে তার চারগুণ ছিল। মা এখন?
A28 বছর
B36 বছর
C30 বছর
D32 বছর
Answer & Solution
Correct answer: C. 30 বছর
শর্তগুলি M = 2C + 6 এবং M = 4C − 18 দেয়, তাই C = 12 এবং M = 30 বছর।
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