1. What is the speed of the boat in still water?
The boat's speed in still water is 13 km/hr.
2. What is the speed of the stream?
The stream's speed is 4 km/hr.
3. How do you calculate downstream speed?
Downstream speed is the sum of the boat's speed in still water and the stream's speed. In this case, it's 17 km/hr.
4. What is the formula for time, speed, and distance?
The formula is time = distance / speed.
5. How is downstream speed calculated?
Downstream speed = boat's speed in still water + stream's speed.
6. What is the downstream speed in this scenario?
The downstream speed is 17 km/hr.
7. What is the given distance for the downstream journey?
The distance for the downstream journey is 68 km.
8. How do you calculate time for the downstream journey?
Time = distance / downstream speed.
9. What is the time taken for the boat to go 68 km downstream?
It takes 4 hours.
10. How does the speed-time-distance formula relate to this problem?
The formula is used to calculate time, given distance and speed.
11. What does the speed-time-distance formula state?
Time = distance / speed.
12. How is speed related to distance and time?
Speed = distance / time.
13. What units should be consistent for the speed, distance, and time formula to work?
The units should be compatible; for example, if distance is in km and time in hours, speed will be in km/hr.
14. What happens to speed if distance increases while time remains constant?
Speed increases.
15. How is speed related to time when distance remains constant?
Speed is inversely proportional to time; if time increases, speed decreases.
16. What is the relation between speed and distance when time is constant?
Speed is directly proportional to distance; if distance increases, speed increases.
17. How can the formula be rearranged to solve for distance?
Distance = speed x time.
18. How is speed inversely proportional to time explained?
If time taken increases, speed decreases; if time decreases, speed increases.
19. What is the significance of compatible units in the formula?
Units need to be consistent for meaningful calculations; e.g., km for distance and hours for time.
20. How does the rearranged formula Time = Distance / Speed help?
It allows solving for time when distance and speed are known.
21. What does the formula Speed = Distance / Time help calculate?
It calculates the speed of an object when distance and time are known.
