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A + A = 30 or, 2A = 30 or, A = 30/2 or, A = 15 আবার, B + B = 20 or, 2B = 20 or, B = 10 এবং, C + C = 10 or, 2C = 10 or, C = 5 এখন A + B × C = 15 + 10 × 5 = 15 + 50 = 65 ans:
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