Let total work =LCM(10,15)=30 units. Efficiency of A+B =30/10=3; of A =30/15=2. So B =3−2=1. B alone takes 30/1=30 days.
CUET UG 2023 — General Test Arithmetic
A and B working together can do a work in 10 days. If A can do the work in 15 days, then how many days will B take to do the same work?
Held on 24 May 2023 · Verified 13 Jul 2026.
40
30
20
25
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