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  • Question
  • A parallelogram has sides 60 m and 40 m and one of the diagonal is 80 m long. Then its area is?


  • Options
  • A. 480 sq. m
  • B. 320 sq. m
  • C. 600? 15 sq. m
  • D. 450 ? 15 sq. m

  • Correct Answer
  • 600? 15 sq. m 

    Explanation

    AB = 60 m, BC = 40 m and AC = 80 m
    ? s = (60 + 40 + 80 ) / 2 m = 90 m
    (s-a) = 90 - 60 = 30 m,
    (s-b) = 90 - 40 = 50 m and
    (s-c) = 90 - 80 = 10 m

    ? Area of ? ABC =
    ?s(s-a)(s-b)(s-c)
    = ?90 x 30 x 50 x 10 m2
    = 300?15 m2

    ? Area of parallelogram ABCD = 2 x area of ? ABC
    = 600?15 m2


  • More questions

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      If a : b = 2 : 3 and 2 : a =1 : 2, then the value of 'b' is?

    • Options
    • A. 4
    • B. 6
    • C. 1 / 3
    • D. 3 / 2
    • Discuss
    • 2. 
      0.6 of a number equals 0.09 of another number. The ratio of the number is?

    • Options
    • A. 2 : 3
    • B. 1 : 15
    • C. 20 : 3
    • D. 3 : 20
    • Discuss
    • 3. 
      If a/3 = b/8, then ( a + 3 ) : ( b + 8 ) is equal to?

    • Options
    • A. 3 : 8
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    • Discuss
    • 4. 
      4, 19, 49,?, 229

    • Options
    • A. 75
    • B. 109
    • C. 65
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    • 5. 
      777777 / 11 =?

    • Options
    • A. 7077
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    • 6. 
      Find the cardinal number of the following set {x: x is a natural number ? 30 and is divisible by 7 or 11}

    • Options
    • A. 4
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    • 7. 
      SBI lent ? 1331 lakh to the TATA group at compound interest and got ?1728 lakh after 3 yr. What is the rate of interest charged, if compounded annually?

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    • 8. 
      The sum of two numbers is 10. Their product is 20. Find the sum of the reciprocals of the two numbers.

    • Options
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    • 9. 
      5 men and 6 women can earn ? 2160 in 4 days. 8 men and 10 women can earn ? 4400 in 5 days. In how many days can 4 men and 9 women earn ? 1800?

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    • 10. 
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    • Options
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