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  • Question
  • A railing of 288 m is required for fencing a semi-circular park. Find the area of the park. (? = 22/7)


  • Options
  • A. 4928 m2
  • B. 9865 m2
  • C. 8956 m2
  • D. 9856 m2

  • Correct Answer
  • 4928 m2 

    Explanation

    Let the radius of the park be r, then
    ?r + 2r = 288
    (? + 2)r = 288
    ? [(22/7) + 2]r = 288
    ? r = (288 x 7)/36 = 56

    ? Area of the park = (1/2)?r2
    = (1/2) x (22/7) x 56 x 56
    = 4928


  • More questions

    • 1. 
      In a 100 meter race, A runs at 5Km/h. A gives B a start of 8 meter and still beats him by 8 sec. Find out the speed of B.


    • Options
    • A. 6.14 Km/h
    • B. 4.14 Km/h
    • C. 3.14 Km/h
    • D. 2.14 Km/h
    • Discuss
    • 2. 
      A train 540 m long is running with a speed of 72 km/hr. In what time it pass a tunnel 160 m long?

    • Options
    • A. 40 sec
    • B. 30 sec
    • C. 35 sec
    • D. 42 sec
    • Discuss
    • 3. 
      A room 5.44 m x 3.75 m is to be paved with square tiles. the least number of tiles required to cover the floor is?

    • Options
    • A. 162
    • B. 176
    • C. 184
    • D. 192
    • Discuss
    • 4. 
      A train runs with a speed of 200 km/hour. What will be its speed in m/sec?

    • Options
    • A. 50 m/sec
    • B. 55.55 m/sec
    • C. 48 m/sec
    • D. 66.66 m/sec
    • Discuss
    • 5. 3, 5, 11, 14, 17, 21

    • Options
    • A. 21
    • B. 17
    • C. 14
    • D. 3
    • Discuss
    • 6. 
      If a clock strikes 6 times in five seconds, the number of strikes in 10 seconds is:

    • Options
    • A. 10
    • B. 11
    • C. 9
    • D. 8
    • Discuss
    • 7. 
      The ratio of pens and pencil in a stationary shop is 3 : 2, respectively, The average number of pens and pencils is 180. What is the 30% of number of pencils in the shop?

    • Options
    • A. 150
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    • Discuss
    • 8. 
      The average age of a man and his two twin sons born on the same day is 30 yr. The ratio of the ages of father and one son is 5 : 2, What is the father's age?

    • Options
    • A. 50 yr
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    • C. 45 yr
    • D. 20 yr
    • Discuss
    • 9. A and B can complete a work in 15 days and 10 days respectively. They started doing the work together but after 2 days B had to leave and A alone completed the remaining work. The whole work was completed in :

    • Options
    • A. 8 days
    • B. 10 days
    • C. 12 days
    • D. 15 days
    • Discuss
    • 10. 
      The average of 11 numbers is 36. Out of these 11 numbers, the average of 9 numbers is 34. If the ratio of remaining two numbers is 2 : 3, find out the smaller number.

    • Options
    • A. 18
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