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ATQ Let the efficiency of Priya be '2a' units/day. So, the efficiency of Vikas = 0.40 × 2a = '0.8a' units/day. So, total work = (2a + 0.8a) × 130 = '364a' units. So, combined efficiency of Ankit and Priya = (364a/200) = '1.82a' units/day. Therefore, required time = [(364a × 0.8) ÷ (2a + 0.8a)] = 91 days.
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