Robinson has enough food for 30 days if he eats 4 kg per day.After 10 days, he finds an extra 40 kg of food.For how many more days will the food last if he continues eating 4 kg per day?
Robinson travels by boat for 4 hours at a speed of 7 km/h.[br]What distance does he travel?
Robinson builds a rectangular fence with a perimeter of 50 m.The length is 5 m greater than the width. What is the width of the fence?