Question
Abi and Valen have a bicycle race. Abi cycles at a speed of 15 km/h. Valen cycles at a speed of 20 km/h. If Valen lets Abi start 40 min before him, how long will Valen take to catch up with Abi?
3 m

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Abi and Valen have a bicycle race. Abi cycles at a speed of 15 km/h. Valen cycles at a speed of 20 km/h. If Valen lets Abi start 40 min before him, how long will Valen take to catch up with Abi?