IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: How fast do satellites orbit the earth? 1773 0

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    28,000 kmph
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    26,000 kmph
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    17,500 kmph
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  • 4
    22,500 kmph
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उत्तर : 1. "28,000 kmph"
व्याख्या :

Answer: A) 28,000 kmph Explanation: Satellites orbit the earth at a speed of 28,000 kmph. Satellites that are further away actually travel slower. The International Space Station has a Low Earth Orbit, about 400 kilometers (250 miles) above the earth's surface. Objects orbiting at that altitude travel about 28,000 kilometers per hour (17,500 miles per hour).

प्र: It costs Rs. p each to send the first thousand messsages and Rs. q to send each subsequent one . If r is greater than 1,000, how many Rupees will it cost to send r messages ? 1773 0

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    1000 (r - p) + pq
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    1000 p + qr
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    1000 (r - q) + pr
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  • 4
    1000(p - q) + qr
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उत्तर : 4. "1000(p - q) + qr"
व्याख्या :

Answer: D) 1000(p - q) + qr Explanation: We need to find the total cost to send r messsages, r > 1000. The first 1000 messsages will cost Rs.p each (Or)  The total cost of first 1000 messsages = Rs.1000p The remaining (r - 1000) messsages will cost Rs.q each (Or) The cost of the (r - 1000) = Rs.(r - 1000)y   Therefore, total cost = 1000p + rq - 1000q = 1000(p - q) + qr

प्र: On a bank reconciliation, deposits in transit are 1772 0

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    added to the book balance
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    added to the bank balance
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    deducted from the book balance
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    None of the above
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उत्तर : 2. "added to the bank balance"
व्याख्या :

Answer: B) added to the bank balance Explanation: A deposit in transit is cash (currency, coins, checks, electronic transfers) that a company has received and is rightfully reported as Cash on its balance sheet, but does not appear on the bank statement until a later date.

प्र: A quantity of tea is sold at Rs. 5.75 per kilogram. The total gain by selling the tea at this rate is Rs. 60. Find the quantity of tea being sold if a profit of 15% is made on the deal ? 1772 0

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    72 kgs
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    80 kgs
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    76 kgs
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    84 kgs
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उत्तर : 2. "80 kgs"
व्याख्या :

Answer: B) 80 kgs Explanation: Say total cost price of tea is x.Then total profit at a rate of 15% is = (15x/100)According to question,15x/100 = 60so x = 400C.p of the tea is Rs. 400.so total selling price will be = (400+60) = Rs.460so the quantity of the tea will be = (460/5.75) = 80kg.

प्र: Crack the Logical #MathPuzzle? 1772 0

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उत्तर :
व्याख्या :

From given data, Rs. 1 = 40 strawberries => Rs. 2 = 80 strawberries Rs. 5  = 1 apple => Rs. 95 = 19 apple. Rs. 3 = 1 mango => Rs. 3 = 1, mango Now, Total So 100 Rs = 100 Fruits.

प्र: Cactus Spines are Modified 1771 0

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    Stems
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    Branches
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    Leaves
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    Roots
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उत्तर : 3. "Leaves"
व्याख्या :

Answer: C) Leaves Explanation: Cactus spines are also known as modified bud scales, which are also called modified leaves.   Cactus spines occur in clusters in the axil of leaves.

प्र: Why are viruses considered to be nonliving? 1771 0

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    Viruses have no metabolic activity.
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    Viruses don't have any cells, like living organisms.
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    Viruses can't produce new proteins, DNA, or RNA.
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    All the above
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उत्तर : 4. "All the above"
व्याख्या :

Answer: D) All the above Explanation: Viruses are responsible for some of the most dangerous and deadly diseases including influenza, ebola, rabies and smallpox. Despite their potential to kill, these potent pathogens are in fact considered to be non-living.   Reasons: 1. Viruses don't have any cells, like living organisms do. They have protein coats but no organelles or other cellular machinery. Just a little DNA packet. 2. Viruses can't produce new proteins, DNA, or RNA and therefore are unable to reproduce on their own. They need infected cells' machinery to make all of these and produce new virons. 3. Viruses have no metabolic activity. They don't use or convert energy and have no ongoing interior processes. They're basically just inert structures until they impact a potential host cell.

प्र: Electrical Pressure is also called 1770 0

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    Current
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    Voltage
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    Resistance
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    Power
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उत्तर : 2. "Voltage"
व्याख्या :

Answer: B) Voltage Explanation: Electrical Pressure is also called as Voltage. Voltage is measured in Volts.   Volt : A unit of electrical pressure or Voltage is called Volt.   One volt is the amount of pressure required to cause one ampere of current to flow against one ohm of resistance.   Voltage is also referred to as Electromotive Force or Electrical Potential or Electrical Pressure.

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