Quiz Discussion

A man can row three quarters of a kilometers against the stream in 11 1/4 minutes and return in 7 1/2​ minutes.The speed of the man in still water is

• 1]

  2 km/h

• 2]

  3 km/h

• 3]

  4 km/h

• 4]

  5 km/h

A man rows 12 km in 5 hours against the stream and the speed of current being 4 kmph. What time will be taken by him to row 15 km with the stream?

• 1]

  1 hour \({ \text{27}}\frac{7}{{13}}\) minutes

• 2]

  1 hour \({ \text{24}}\frac{7}{{13}}\) minutes

• 3]

  1 hour \({ \text{25}}\frac{7}{{13}}\) minutes

• 4]

  1 hour \({ \text{26}}\frac{7}{{13}}\) minutes

A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. Then the speed of boat in still water and the speed of current are respectively.

• 1] 4 kmph and 3 kmph
• 2] 4.5 kmph and 0.5 kmph
• 3] 4 kmph and 2 kmph
• 4] 5 kmph and 2 kmph

A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?

• 1] 40 minutes
• 2] 1 hour
• 3] 1 hr 15 min
• 4] 1 hr 30 min

A boat takes half time in moving a certain distance downstream than upstream. The ratio of the speed of the boat in still water and that of the current is?

• 1] 2 : 1
• 2] 4 : 3
• 3] 1 : 2
• 4] 3 : 1

A man can row upstream at 12km/hr and downstream at 18 km/hr. The man rowing speed in still water is?

• 1] 15 km/hr
• 2] 5 km/hr
• 3] 3 km/hr
• 4] 10 km/hr

The speed of a boat along the stream is 12 km/hr and against the stream is 8 km/hr. The time taken by the boat to sail 24 km in still water is?

• 1] 2 hrs
• 2] 3 hrs
• 3] 2.4 hrs
• 4] 1.2 hrs

A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:

• 1] 1 km/hr
• 2] 1.5 km/hr
• 3] 2 km/hr
• 4] 2.5 km/hr

The speed of the boat in still water is 5 times that of current, it takes 1.1 hour to row to point B from point A downstream. The distance between point A and point B is 13.2 km. How much distance (in km) will it cover in 312 minutes upstrem?

• 1] 43.2
• 2] 48
• 3] 41.6
• 4] 44.8

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

• 1]

  2 hours

• 2]

  3 hours

• 3]

  4 hours 

• 4]

  5 hours