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  • Question
  • Sravan drove from home to a neighboring town at the speed of 50 km/h and on his returning journey, he drove at the speed of 45 km/h and also took an hour longer to reach home. What distance did he cover?


  • Options
  • A. 350 kms
  • B. 450 kms
  • C. 900 kms
  • D. 700 kms

  • Correct Answer
  • 900 kms 

    Explanation

    Let the distance he covered each way = d kms

    According to the question,

    d/45 - d/50 = 1

    => d = 450 kms.

     

    Hence, the total distance he covered in his way = d + d = 2 d = 2 x 450 = 900 kms.

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    Boats and Streams problems


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    • 1. A motorboat running upstream takes 8 hours 48 minutes to cover a certain distance, while it takes 4 hours to cover the same distance running downstream. What is the ratio between the speed of the motorboat and speed of the water current respectively?

    • Options
    • A. 3:7
    • B. 7:9
    • C. 5:4
    • D. 8:3
    • Discuss
    • 2. Amith can row a boat d km upstream and the same distance downstream in 5 hours 15 minutes. Also, he can row the boat 2d km upstream in 7 hours. How long will it take to row the same distance 2d km downstream for Amith ?

    • Options
    • A. 4 hrs 10 min
    • B. 3 hrs 15 min
    • C. 3 hrs 30 min
    • D. 4 hrs 1 min
    • Discuss
    • 3. A person can row 8 1/2 km an hour in still water and he finds that it takes him twice as long to row up as to row down the river. The speed of the stream ?

    • Options
    • A. 1.78 kmph
    • B. 2.35 kmph
    • C. 2.83 kmph
    • D. 3.15 kmph
    • Discuss
    • 4. A man swims downstream 72 km and upstream 45 km taking 9 hours each time; what is the speed of the current ?

    • Options
    • A. 1 kmph
    • B. 3.2 kmph
    • C. 1.5 kmph
    • D. 2 kmph
    • Discuss
    • 5. A man can row against the current three fourth of a kilometer in 15 min and returns same distance in 10 min, then ratio of his speed to that of current?

    • Options
    • A. 5:1
    • B. 3:1
    • C. 4:1
    • D. 2:1
    • Discuss
    • 6. A Woman?s downstream swimming rate is thrice of her upstream swimming rate. If she covers 12 km upstream in 2.5 hours, what distance she will cover in 5 hours downstream?

    • Options
    • A. 72 km
    • B. 36 km
    • C. 56 km
    • D. 42 km
    • Discuss
    • 7. A boat can move 5 km/hr in still water. If the river is running at 1 km/hr, it takes it 75 min to move to a place and back. How far is the place?

    • Options
    • A. 3 kms
    • B. 5 kms
    • C. 6 kms
    • D. 4 kms
    • Discuss
    • 8. A motorboat takes half time to cover a certain distance downstream than upstream. What is the ratio between rate of current and rate of boat in still water?

    • Options
    • A. 1 : 3
    • B. 3 : 2
    • C. 2 : 3
    • D. 3 : 1
    • Discuss
    • 9. A man can row upstream at 16 km/hr and downstream at 24 km/hr. Find the speed of the current.

    • Options
    • A. 4 kmph
    • B. 6 kmph
    • C. 5 kmph
    • D. 3 kmph
    • Discuss
    • 10. A motorboat goes 8 km an hour in still water, but takes thrice as much time in going the same distance against the current than going with the current. Then find the speed of the current?

    • Options
    • A. 4 kmph
    • B. 6 kmph
    • C. 3 kmph
    • D. 2 kmph
    • Discuss


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