Ace GCSE
GCSEMocksProgressGCSE MathsAI revisionPricing
Your exam tier

Free web sample

Try 30 questions here. The full topic has 48 questions in the app.

Download AceGCSE on the App StoreGet AceGCSE on Google Play
1 / 10

Maths · Speed, distance & time

Crossover

A coach travels DD km at a constant speed. If its speed were 20 km/h greater, the journey would take 30 minutes less. If instead its speed were 20 km/h less, the journey would take 45 minutes more. Work out DD.

Choose an answer — or press 1234