Time and Work · UPSC CDS/OTA · Question 18 of 60

Time and Work – Question 18

Step-by-step solution. Time and Work for UPSC CDS/OTA.

Topic
Time and Work
Subject
Mathematics
Difficulty
Medium
Solve Time
45–60 sec

Solved UPSC CDS/OTA Question

A solved UPSC CDS/OTA PYQ — decoded step-by-step.

Solve it the standard way once — then learn the shortcut.

Q · Time and WorkMedium · 45s

A and B can together finish work in 30 days. They worked together for 20 days and then B left. After another 20 days, A finished the remaining work. In how many days A alone can finish the job?

TopicTime and Work
Question Typemultiple choice
DifficultyMedium
Marking+1 / −0.25
Test Duration30 min

Step-by-Step Solution

The complete worked solution.

Every step explained — no skipped algebra.

Solution illustration 1
Final Answer: Option B — 50
Solve Question✦ Build Plan
Time and Work Question 18 – UPSC CDS/OTA