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  • Question

  • In a town 80% of the population are adults of which the men and women are in the ratio of 9 : 7, respectively. If the number of adult women is 4.2 lakh, what is the total population of the town?


  • Options
  • A. 12 lakh
  • B. 9.6 lakh
  • C. 9.8 lakh
  • D. 11.6 lakh

  • Correct Answer
  • 12 lakh 

    Explanation

    let the number of adult men be N.
    Then, ratio of the numbers of adult men and adult women
    9 : 7 = N : 4.2
    ? N = (9/7) x 4.2 = 5.4 Lakh
    Total adult population = 4.2 + 5.4 = 9.6 lakh.

    If the population of the town be M Lakh,
    then, 80M/100 = 9.6
    ? M = (9.6 x 100)/80 = 12 lakh

    • More questions

    • 1. 
      In ? ABC ,sides BC = 10 cm and height AD = 4.4 cm. If AC = 11 cm. Then altitude BE equals?

    • Options
    • A. 5 cm
    • B. 4 cm
    • C. 5.6 cm
    • D. 5.5 cm
      • Discuss
    • 2. A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:

    • Options
    • A. 12 pi cub.cm
    • B. 15 pi cub.cm
    • C. 16 pi cub.cm
    • D. 20 pi cub.cm
      • Discuss
    • 3. The radius of a cylindrical milk container is half its height and surface area of the inner part is 616 sq.cm. The amount of milk that the container can hold, approximately, is [ Use : ?5 = 2.23 and ? = 22/7 ]

    • Options
    • A. 1.42 litres
    • B. 1.53 litres
    • C. 1.71 litres
    • D. 1.82 litres
      • Discuss
    • 4. A solid brass sphere of radius 2.1 dm is converted into a right circular cylindrical rod of length 7cm. The ratio of total surface areas of the rod to the sphere is

    • Options
    • A. 3:1
    • B. 1:3
    • C. 7:3
    • D. 3:7
      • Discuss
    • 5. ABCD is a cyclic quadrilateral of which AB is the diameter. Diagonals AC and BD intersect at E. If ?DBC = 35°, Then ?AED measures

    • Options
    • A. 35°
    • B. 45°
    • C. 55°
    • D. 90°
      • Discuss
    • 6. In a triangle ABC, ?A = 70°, ?B = 80° and D is the incentre of ?ABC. ?ACB = 2x° and ?BDC = y°. The values of x and y, respectively are

    • Options
    • A. 15, 130
    • B. 15, 125
    • C. 35, 40
    • D. 30, 150
      • Discuss
    • 7. In a right angled triangle ?DEF, if the length of the hypotenuse EF is 12 cm, then the length of the median DX is

    • Options
    • A. 3 cm
    • B. 4 cm
    • C. 6 cm
    • D. 12 cm
      • Discuss
    • 8. PQ and RS are common tangents to two circles intersecting at A and B. AB, when produced both sides, meet the tangents PQ and RS at X and Y, respectively. If AB = 3 cm, XY = 5 cm, then PQ (in cm) will be

    • Options
    • A. 3 cm
    • B. 4 cm
    • C. 5 cm
    • D. 2 cm
      • Discuss
    • 9. ABCD is a trapezium in which AB is parallel to CD and AB = 4(CD). The diagonals of the trapezium intersects at O. What is the ratio of area of triangle DCO to the area of the triangle ABO?

    • Options
    • A. 1 : 4
    • B. 1 : 2
    • C. 1 : 8
    • D. 1 : 16
      • Discuss
    • 10. In the given figure, ?QRU = 72°, ?TRS = 15°, ?PSR = 95° , then what is the value (in deg) of ? PQR?

    • Options
    • A. 85
    • B. 95
    • C. 75
    • D. 90
      • Discuss

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