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  • Question
  • The length of the longest pole that can be placed in a room 12 m long and 9 m wide and 8 m high is?


  • Options
  • A. 12 m
  • B. 14 m
  • C. 17 m
  • D. 21 m

  • Correct Answer
  • 17 m 

    Explanation

    Length of longer rod = ?l2 + b2 + h2
    = ?122 + 92 + 82
    = ?144 + 81 + 64
    = ?289
    = 17 m


  • More questions

    • 1. 
      A train overtake two persons walking along a railway track. The first one walks at 4.5 km/h and the other one walks at 5.4 km/h. The train needs 8.4 s and 8.5 s respectively , to overtake them. What is the speed of the train, if both the persons are walking in the same direction as the train?

    • Options
    • A. 66 kkm/h
    • B. 72 km/h
    • C. 78 km/h
    • D. 81 km/h
    • Discuss
    • 2. Maneela, Raghu and Aravind have some jems with each of them. Five times the number of jems with Raghu equals seven times the number of jems with Maneela while five times the number of jems with Maneela equals seven times the number of jems with Aravind. What is the minimum number of jems that can be there with all three of them put together ?

    • Options
    • A. 108
    • B. 107
    • C. 109
    • D. 110
    • Discuss
    • 3. 
      Two trains A and B starts from Howrah and Patna towards Patna and Howrah respectively at the same time. After passing each other, they take 4, h, 48 min and 3 h, 20 min to reach Patna and Howrah, respectively. If the train from Howrah is moving at 45 km/h, then the speed of the other train is?

    • Options
    • A. 60 km/h
    • B. 45 km/h
    • C. 35 km/h
    • D. 54 km/h
    • Discuss
    • 4. Two solutions have milk & water in the ratio 7:5 and 6:11. Find the proportion in which these two solutions should Be mixed so that the resulting solution has 1 part milk and 2 parts water ?

    • Options
    • A. 7 : 12
    • B. 8 : 13
    • C. 9 : 4
    • D. 2 : 5
    • Discuss
    • 5. 
      A train travelling at 36 kmph completely crosses another train having half its length and travelling in the opposite direction at 54 kmph, in 12 second, If it also passes a railway platform in 1 1/ 2 minutes, the length of the platform is?

    • Options
    • A. 560 metres
    • B. 620 metres
    • C. 700 metres
    • D. 750 metres
    • Discuss
    • 6. 
      A person standing on the bank of a river observes that the angle subtended by a tree on the opposite bank is 60°, when he retires 40 meters from the bank then he find the angle to be 30°. Then the breadth of the river is?

    • Options
    • A. 40 m
    • B. 60 m
    • C. 20 m
    • D. 30 m
    • Discuss
    • 7. 
      The angle of elevation of the top of two vertical towers as seen from the middle point of the line joining the foot of the towers are 60° and 30° respectively. The ratio of the heights of the towers is?

    • Options
    • A. 2 : 1
    • B. ?3 : 1
    • C. 3 : 2
    • D. 3 : 1
    • Discuss
    • 8. 
      On the ground level the angle of elevation of the top of a tower is 30°, On moving 20 m nearer the tower, the angle of elevation found to be 60°. The height of the tower is?

    • Options
    • A. 10 m
    • B. 10?3 m
    • C. 15 m
    • D. 20 m
    • Discuss
    • 9. 
      From the top of h meter high cliff the angles of depression of the top and the button of a tower are observed to be 30° and 60° respectively. The height of the tower is?

    • Options
    • A. h?3
    • B. 2h?3
    • C. h/3
    • D. 2h/3
    • Discuss
    • 10. The marks obtained by Vijay and Amith are in the ratio 4:5 and those obtained by Amith and Abhishek in the ratio of 3:2. The marks obtained by Vijay and Abhishek are in the ratio of ?

    • Options
    • A. 4:5
    • B. 6:5
    • C. 3:2
    • D. 1:3
    • Discuss


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