1. A car travels 20 kph faster than a truck. The car covers 350 km in two hours less than the time it takes the truck to travel the same distance. What is the speed of the car? How about the trucks?
2. Jane and Maria can clean the house in 8 hours if they work together. The time that Jane takes in cleaning the house along is 4 hours more than the time Maria takes in cleaning the same house. How long does it take Jane to clean the house alone? How about Maria?