Question
Ben took 2 hours to walk from Building Q to Building R which was 4 km away. On his way back from Building R to Building Q, he increased his average walking speed by 1 km/h. How long did he take for his journey back?
3 m

Click button first when a symbol is required. X

Ben took 2 hours to walk from Building Q to Building R which was 4 km away. On his way back from Building R to Building Q, he increased his average walking speed by 1 km/h. How long did he take for his journey back?