Junior Cycle · Distance, Speed and Time
⏱ Tested in 2 exam questions since 2022
Lesson 1 of 1
JCHL Distance, Speed and Time
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- The DST triangle: D on top, S in the bottom-left and T in the bottom-right. Cover the letter you want and read off what is left: S = D/T, T = D/S, D = S × T
- Decimal hours → minutes: multiply the decimal part by 60. Minutes → decimal hours: divide by 60
- Always check the units match (km with km/h, or m with m/s) before you use the triangle
- Unit conversion comes up in this topic too — the same skills you used in Area, Volume and Measurement
Formula used
D = S × T, S = D/T, T = D/S
Most recent exam questions
- 2023 Q8(c)(i)
- 2023 Q8(c)(ii)
- 2022 Q10(e)
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