Ответ:

my mum goes to work on foot. It takes her 20 minutes.

Olha goes to school by bike. It takes her 10 minutes

Roman goes to university by the underground/scooter. It takes him 40 minutes

my granny goes to a market place by trolleybus. it takes her 15 minutes.

The Petrenkos goes to the seaside by plane. it takes him 2 hours

Travellers go to along tbe Dnipro River by boat. it takes them 10 hours.