6. Suppose a car travels at a constant rate of 70 kph for 2 hours and J\". travels 55 kph thereafter. The distance (in km) travelled by the car may be expressed as 70t for 0 2 where t is the elapsed time measured in hours. Find 05- 7. A man logs for 20 minutes at a rate of 6 kph. then walks for 30 minutes I at a rate of 3 kph. then sits and rests for 15 minutes and nally walks for 45 minutes. The rule of the function that expresses his distance travelled as a function of time (In hours) may be given as 3 5 _ _ g: d for 6