Physics

Physics

Problem

An autorickshaw covers a distance of 18 km18\,\text{km} in 30 min30\,\text{min}. Calculate its average speed in (i) km/h\text{km/h} and (ii) m/s\text{m/s}.
Intuitive explanation

Average speed is just total distance divided by total time—but you need to match your units to what the question asks for. The key is converting time correctly: 30 minutes is half an hour, so you can find km/h directly, then convert that result to m/s using the factor 3.6 (or equivalently, converting 18 km to meters and 30 min to seconds before dividing).

Intuitive explanation

Average speed is just total distance divided by total time—but you need to match your units to what the question asks for. The key is converting time correctly: 30 minutes is half an hour, so you can find km/h directly, then convert that result to m/s using the factor 3.6 (or equivalently, converting 18 km to meters and 30 min to seconds before dividing).

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