IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: O and O' are the center of the two circles with radii 7cm and 9cm respectively. The distance between the centers is 20cm. If PQ be the transverse common tangent to the circles, which cuts OO' at X, what is the length of O'X in cm ? 1164 0

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    10
    सही
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  • 2
    6
    सही
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  • 3
    35/4
    सही
    गलत
  • 4
    45/4
    सही
    गलत
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उत्तर : 4. "45/4"
व्याख्या :

Answer: D) 45/4 Explanation: As clear from the figure itself, triangle OQX and triangle O'PX are similar. So, OQ/O'P = OX/O'X => OX = (7/9)xO'X And since, OX + O'X = 20 => (7/9)xO'X + O'X = 20 => O'X = 45/4

प्र: What is 12 S of the Z? 1164 0

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उत्तर :
व्याख्या :

12 S of Z represents 12 Signs of the Zodiac.   It is similar to the 1. 52 W in a Y        -  52 weeks in a year 2. 3 H in a C          -  3 Hands in a Clock 3. 3600 S in an H   -  3600 Seconds in an Hour 4. 5 O in the W      -   5 Oceans in the World

प्र: What is consumption disease in the 19th century? 1162 0

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    Tuberculosis
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    Paralysis
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  • 3
    Plague
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    गलत
  • 4
    Cholera
    सही
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उत्तर : 1. "Tuberculosis"
व्याख्या :

Answer: A) Tuberculosis Explanation: Tuberculosis (TB) was the leading cause of death in the United States and one of the most feared diseases in the world during the 19th and early 20th centuries. Formerly known as Consumption diseases because many types of lung diseases were lumped under the term 'consumption'. Lung cancer and bronchitis were examples.

प्र: The Human Resource Development Ministry and the External Affairs Ministry launched an online verification portal ___________ to make the document verification process easier. 1161 0

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    e-bharat
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    e-sanad
    सही
    गलत
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    e-foriegn
    सही
    गलत
  • 4
    e-verify
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उत्तर : 2. "e-sanad"
व्याख्या :

Answer: B) e-sanad Explanation: The Human Resource Development Ministry and the External Affairs Ministry launched an online verification portal to make the document verification process easier for students who planning to study abroad. The Central Board of Secondary Education’s (CBSE) academic repository of degrees and certificates “Parinam Manjusha” was also involved in the project of creating “eSanad”.

प्र: One-third of the boys and one-half of the girls of a college participated in a sport. If the number of participating students is 300, out of which 100 are boys. What is the total number of students in the college ? 1160 0

  • 1
    550
    सही
    गलत
  • 2
    575
    सही
    गलत
  • 3
    625
    सही
    गलत
  • 4
    700
    सही
    गलत
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उत्तर : 4. "700"
व्याख्या :

Answer: D) 700 Explanation: Let number of boys = B Number of girls = G From the given data, 1B/3 + 1G/2 = 300 But given B/3 = 100 => B = 300 G/2 = 300 - 100 G = 200 x 2 => G = 400 Therefore, total number of students in the college = B + G = 700.

प्र: Which public sector bank has tied up with Tirumala Milk Products for providing loans to dairy farmers  ? 1159 0

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    Axis Bank
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    ICICI Bank
    सही
    गलत
  • 3
    State Bank Of India
    सही
    गलत
  • 4
    HDFC Bank
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    गलत
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उत्तर : 3. "State Bank Of India"
व्याख्या :

Answer: C) State Bank Of India Explanation: The State Bank of India (SBI) has tied-up with Tirumala Milk Products to provide loans to dairy farmers who supply milk to the latter. As per the scheme for financing dairy units, SBI offers loans for construction of shed, and purchase of milch animals, milking machine, and chaff cutter. Apart from this, the bank also provides loans to dairy societies for modernisation and creation of infrastructure such as purchase of automatic milk collection system, purchase of transport vehicles and bulk chilling unit. The Tirumala Milk Products is a South- based company, which was acquired by France-based Groupe Lactalis in 2014.

प्र: Which company is now listed to be one of the world's most valuable privately held companies ? 1158 0

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    Space X
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  • 2
    Tata Steels
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  • 3
    Facebook
    सही
    गलत
  • 4
    Apple
    सही
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उत्तर : 1. "Space X"
व्याख्या :

Answer: A) Space X Explanation:

प्र: 4 men and 6 women can complete a work in 8 days, while 3 men and 7 women can complete it in 10 days. In how many days will 10 women complete it ? 1158 0

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    40 days
    सही
    गलत
  • 2
    36 days
    सही
    गलत
  • 3
    32 days
    सही
    गलत
  • 4
    34 days
    सही
    गलत
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उत्तर : 1. "40 days"
व्याख्या :

Answer: A) 40 days Explanation: Let 1 man's 1 day work = x and 1 woman's 1 day work = y.Then, 4x + 6y = 1/8 and 3x + 7y = 1/10Solving these two equations, we get:x = 11/400 and y = 1/40010 woman's 1 day work = (1/400 x 10) = 1/40. Hence, 10 women will complete the work in 40 days.

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