Question
A and B can do a piece of work in 15 and 20 days
respectively. They work together for 5 days, then A leaves. How long will B take to finish?Solution
ATQ,
Work in 1 day = A: 1/15, B: 1/20 5 days = 5(1/15 + 1/20) = 5×7/60 = 7/12 Remaining = 5/12 B alone → 5/12 ÷ 1/20 = 8⅓ days.
Statements: B < I ≥ E > K; Z ≤ N = K
Conclusions:
I. Z < E
II. N ≤ I
III. B > N
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