17.Rana walks 20 m straight in north direction and 20 m to the right. Then every turning to his left he walks 5, 25 and 25 metres respectively. How far is he from his starting point now?
In a certain code language, '-' represents '+', '+' represents 'x', 'x' represents '÷' and '÷' represents '-'. Find out the answer to the following question.