A man on foot covers the 25 km between two towns in 3 hours. He walks at 4 kmh for the first part of the journey and runs at 12 kmh-1 for the remaining part.

a How far did he run?

b For how long was he running?

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# A man on foot covers the 25 km between two towns in 3 hours. He walks at 4 kmh for

a How far did he run?

b For how long was he running?