Question
Yen and Ian have a bicycle race. Yen cycles at a speed of 18 km/h. Ian cycles at a speed of 21 km/h. If Ian lets Yen start 40 min before him, how long will Ian take to catch up with Yen?
3 m

Click button first when a symbol is required. X

Yen and Ian have a bicycle race. Yen cycles at a speed of 18 km/h. Ian cycles at a speed of 21 km/h. If Ian lets Yen start 40 min before him, how long will Ian take to catch up with Yen?