SSC GD Constable 4 Feb 2025 Shift 3 Paper

Section: Elementary Mathematics

Question : 51 of 80

Marks: +1, -0

Ritu and Mona can finish painting a house together in 18 days. Ritu alone would take 27 days to finish the painting. How long will it take Mona to finish the painting on her own?

44 days
65 days
60 days
54 days

Validate

Solution:

Work done

=

Time × Efficiency
Calculation:
Total work

={\LCM}(18,27)=54

units
Efficiency of Ritu and Mona

=54 \/ 18=3

Efficiency of Ritu

=54 \/ 27=2

Efficiency of Mona

=3-2=1

Time taken by Mona to finish the painting on her own = 54/1=54 days

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