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Maths
Time and Work
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SSC CGL 2025 First Shift 📅 12 Sep, 2025

A is able to complete a task in 15 days, while B takes 20 days to finish the same task. If they collaborate and work together for 4 days, what fraction of the work will still remain?

A
1/4
B
7/15
C
8/15
D
11/15
Result Summary
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SSC CGL
2025 • 12 Sep, 2025 • First Shift
A is able to complete a task in 15 days, while B takes 20 days to finish the same task. If they collaborate and work together for 4 days, what fraction of the work will still remain?
Correct Answer
8/15
Work done = 4 x (1/15 + 1/20) = 4 x (7/60) = 7/15. Remaining = 8/15....
Ref/Book : 12 Sep S1 2025_3.pdf
Ref. Subject Maths
Chapter -
Ref. Topic Time and Work
Pg. No -
💡 Analysis & Explanation
Introduction ▼
Work done = 4 x (1/15 + 1/20) = 4 x (7/60) = 7/15. Remaining = 8/15.
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