Time & Work, Speed, Distance & Progressions

Work efficiency, pipes & cisterns, relative speed, train problems, AP, and GP.

Target: EPFO APFC 2026•Topic-Level RAG Context Active•Model: Nemotron 3.5 Lightning 30B / 120B

Topic Overview

Work efficiency, pipes & cisterns, relative speed, train problems, AP, and GP.

Key Syllabus Concepts

Time and Work: Unitary method, Total Work LCM approach, Efficiency ratio
Time, Speed and Distance: Average Speed = 2xy/(x+y) for equal distances
Train problems: Relative speed when moving in same vs opposite direction
Arithmetic Progression (AP: Tn = a + (n-1)d, Sn = n/2[2a+(n-1)d]) & Geometric Progression

High-Yield Important Points & Rules

💡 When two objects move in opposite directions, relative speed = S1 + S2.
💡 When moving in same direction, relative speed = |S1 - S2|.

Historical UPSC EPFO PYQ Relevance

3 Matched PYQs

2025•EPFO APFC•General Ability Test• Q.1

Full Question

In the above passage there are four blanks Hy to numbered (1), (ii), (iii) and (iv). Select the option terce from those given below in which the most Nest. appropriate term has been used for each of the — blanks respectively : lay’s tury.

2025•EPFO APFC•General Ability Test• Q.4

Full Question

Which one of the following options most appropriately describes the phrase “exacerbating labour shortages” ?

2025•EPFO APFC•General Ability Test• Q.14

Full Question

Once he began to savour the taste of true wealth, he abandoned all his erstwhile ideas regarding social welfare and was subsequently labelled an apostate.

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