Question
Gabby and Tim have a bicycle race. Gabby cycles at a speed of 18 km/h. Tim cycles at a speed of 21 km/h. If Tim lets Gabby start 30 min before him, how long will Tim take to catch up with Gabby?
3 m

Click button first when a symbol is required. X

Gabby and Tim have a bicycle race. Gabby cycles at a speed of 18 km/h. Tim cycles at a speed of 21 km/h. If Tim lets Gabby start 30 min before him, how long will Tim take to catch up with Gabby?