This is an independent topic guide, not the official syllabus. Compare it with the current paper outline and rules published by the examination authority.
01 / UNDERSTANDING
Learning objectives
Cover direct speed-time-distance relations, time conversion and average speed. Contrast equal-distance and equal-time cases so the learner understands when an arithmetic mean is justified.
02 / UNDERSTANDING
The concept in context
Speed describes distance per unit of time. Keep all units compatible before using distance equals speed times time. Average speed is total distance divided by total time, which is not generally the arithmetic mean of two speeds. The durations or distances attached to each speed determine the correct weighting.
03 / UNDERSTANDING
A worked learning case
Original educational case. A trainee travels 60 km at 30 km/h and returns the same 60 km at 60 km/h. The legs take two hours and one hour. Total distance is 120 km and total time three hours, giving 40 km/h average speed. The simple mean of 45 km/h ignores the longer duration spent at the slower speed.
ORIGINAL EDUCATIONAL PRACTICE
Try it before you check.
Original practice: A vehicle covers 90 km in 1.5 hours. What is its average speed?
Show the answer and reasoning
60 km/h.
Divide total distance by total time: 90 ÷ 1.5 = 60 km/h. The time is already in hours, so no further conversion is needed. If it had been given as ninety minutes, conversion to 1.5 hours would come first. Keeping the units visible prevents an answer that mixes minutes with kilometres per hour.
Two traps to watch for.
- Averaging speeds directly for equal-distance journeys.
- Using minutes with a speed quoted per hour.
YOUR TOPIC-SPECIFIC LEARNING MAP
Your revision map
Label each leg’s distance and time.
Convert all times to one unit.
Divide total distance by total elapsed time.
Explain the idea, apply it to a new situation, then check what changed in your reasoning.
BANKERS TUTORIAL · SOURCE NOTES
Keep the source alongside your notes.
Official links provide subject context and authoritative reference material. This guide’s explanation, scenario and question are original Bankers Tutorial learning content.
- sbi.bank.in https://sbi.bank.in/web/careers/current-openings
- sbi.bank.in https://sbi.bank.in/webfiles/uploads/files_2627/09/SBI_JA-Customer_Support_Sales-IH_Pre-2026-27_Eng.pdf
For SBI preparation, check the current official notice before relying on changing dates, rules or examination requirements.
