Maths Practice Question and Answer

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Answer : 3. "Rs.42500"

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Answer : 4. "Rs.330 "

Q:

यदि $$ sin θ ={20 \over 29}$$,  है  तो sec θ sin θ का मान क्या है?

2497 2

  • 1
    $$ {20 \over 21}$$
    Correct
    Wrong
  • 2
    $$ {29 \over 20}$$
    Correct
    Wrong
  • 3
    $$ {21 \over 20}$$
    Correct
    Wrong
  • 4
    $$ {21 \over 29}$$
    Correct
    Wrong
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Answer : 1. "$$ {20 \over 21}$$"

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Answer : 1. "520 रु "

Q: A 200 m long train passes a motorcycler, running in the same direction at 12 km/hr, in 15 second and a jeep travelling in the same direction in 20 s. At what speed is the car travelling (length of both the motorcycler and jeep is negligible)? 2491 0

  • 1
    36 kmph
    Correct
    Wrong
  • 2
    32 kmph
    Correct
    Wrong
  • 3
    29 kmph
    Correct
    Wrong
  • 4
    24 kmph
    Correct
    Wrong
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Answer : 4. "24 kmph"
Explanation :

Answer: D) 24 kmph Explanation: Let the speed of the train be 'S' kmph From the given data, Distance = Length of train = D = 200 mts = 200 x 18/5 kms Time = 10 sec given speed of the motorcycler = 12 kmph Relative speed as they are moving in the same direction = (S - 12) kmph (S- 12) = 200 x 18515S - 12 = 48S = 60 kmph  Hence, the speed of the train = S = 60 kmph Now, Let the speed of the jeep be 'x' kmph 60 - x = 200 x 1852060 - x = 36x = 60 - 36x = 24 kmph   Therefore, the speed of the jeep = x = 24 kmph.

Q:

दो संख्याओं के वर्गों का योग 68 है और उनके अंतर का वर्ग 36 है, तो उनका गुणनफल होगा -----

2490 0

  • 1
    16
    Correct
    Wrong
  • 2
    32
    Correct
    Wrong
  • 3
    58
    Correct
    Wrong
  • 4
    30
    Correct
    Wrong
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Answer : 1. "16 "

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