RRB NTPC 2021 · Question 72 of 131
Total Efficiency of Jaya Hema and Sushma – 2(Jaya +Hema +Sushma) =4+3+2=9 (Jaya +Hema +Sushma) =9/2=4.5 And now together to clean the apartment=120/4.5 =1200/45=80/3 = 26(2/3) days.
Source: RRB NTPC 2021 CBT 1 Previous Year Paper (3 Feb) — ixambee compilation with answer key · reliable-secondary
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