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  • Question
  • What is the least number of squares tiles required to pave the floor of a room 15 m 17 cm long and 9 m 2 cm broad?


  • Options
  • A. 814
  • B. 820
  • C. 840
  • D. 844

  • Correct Answer
  • 814 

    Explanation
    Length of largest tile = H.C.F. of 1517 cm and 902 cm = 41 cm.

    Area of each tile = (41 x 41) cm2.

    ∴ Required number of tiles = 1517 x 902 = 814.
    41 x 41


    Area problems


    Search Results


    • 1. A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?

    • Options
    • A. 2.91 m
    • B. 3 m
    • C. 5.82 m
    • D. None of these
    • Discuss
    • 2. The diagonal of a rectangle is √41 cm and its area is 20 sq. cm. The perimeter of the rectangle must be:

    • Options
    • A. 9 cm
    • B. 18 cm
    • C. 20 cm
    • D. 41 cm
    • Discuss
    • 3. The ratio between the length and the breadth of a rectangular park is 3 : 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:

    • Options
    • A. 15360
    • B. 153600
    • C. 30720
    • D. 307200
    • Discuss
    • 4. A man walked diagonally across a square lot. Approximately, what was the percent saved by not walking along the edges?

    • Options
    • A. 20
    • B. 24
    • C. 30
    • D. 33
    • Discuss
    • 5. An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:

    • Options
    • A. 2%
    • B. 2.02%
    • C. 4%
    • D. 4.04%
    • Discuss
    • 6. The ratio between the perimeter and the breadth of a rectangle is 5 : 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?

    • Options
    • A. 16 cm
    • B. 18 cm
    • C. 24 cm
    • D. Data inadequate
    • E. None of these
    • Discuss
    • 7. The difference between the length and breadth of a rectangle is 23 m. If its perimeter is 206 m, then its area is:

    • Options
    • A. 1520 m2
    • B. 2420 m2
    • C. 2480 m2
    • D. 2520 m2
    • Discuss
    • 8. A tank is 25 m long, 12 m wide and 6 m deep. The cost of plastering its walls and bottom at 75 paise per sq. m, is:

    • Options
    • A. Rs. 456
    • B. Rs. 458
    • C. Rs. 558
    • D. Rs. 568
    • Discuss
    • 9. The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

    • Options
    • A. 40%
    • B. 42%
    • C. 44%
    • D. 46%
    • Discuss
    • 10. In how many different ways can the letters of the word 'OPTICAL' be arranged so that the vowels always come together?

    • Options
    • A. 120
    • B. 720
    • C. 4320
    • D. 2160
    • E. None of these
    • Discuss


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