For every 22 litres of petrol a car can run for 60 km. How much petrol do you need (to 1 DP) to ensure the car has enough petrol of a trip that is 175 km?

The pyraminx is a rubik's cube-type toy in the shape of a tetrahedron. the pyraminx shown below has edges 15\,\text{cm}15cm long and vertical height h=12.2\,\text{cm}h=12.2cm. the triangle drawn with dashed lines is a right triangle. what is the distance rr? round your answer to the nearest tenth.