Question
Tom took 2 hours to walk from Building P to Building Q which was 10 km away. On his way back from Building Q to Building P, he increased his average walking speed by 2 km/h. How long did he take for his journey back?
3 m

Click button first when a symbol is required. X

Tom took 2 hours to walk from Building P to Building Q which was 10 km away. On his way back from Building Q to Building P, he increased his average walking speed by 2 km/h. How long did he take for his journey back?