Read "hope" by emily dickinson. Which theme is best supported by the poem? hope is not useful when someone faces challenges. Hope is not an emotion that people understand. Hope is best for people in only small doses. Hope can sustain people through difficult times

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?