For every 25 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 105 km?

The dimensions of the rectangular pool shown below are 60 yards by 30 yards. a fence will be built around the outside of the deck. the ratio of the dimensions of the pool to the dimensions of the fence is 1/3. how many yards of fence should be purchased to enclose the deck?