प्रश्न और उत्तर का अभ्यास करें
8प्र: Taps X and Y can fill a tank in 30 and 40 minutes respectively.Tap Z can empty the filled tank in 60 minutes.If all the three taps are kept open for one minute each,how much time will the taps take to fill the tank? 6512 05b5cc764e4d2b4197774fde1
5b5cc764e4d2b4197774fde1- 148minfalse
- 272minfalse
- 324mintrue
- 4None of thesefalse
- उत्तर देखेंउत्तर छिपाएं
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उत्तर : 3. "24min"
व्याख्या :
Answer: C) 24min Explanation: Given taps X and Y can fill the tank in 30 and 40 minutes respectively. Therefore, part filled by tap X in 1 minute = 1/30 part filled by tap Y in 1 minute = 1/40 Tap Z can empty the tank in 60 minutes. Therefore, part emptied by tap Z in 1 minute = 1/60 Net part filled by Pipes X,Y,Z together in 1 minute = [1/30 +1/40 - 1/60] = 5/120 = 1/24 i.e., the tank can be filled in 24 minutes.
प्र: A boatman can row 3 km against the stream in 20 minutes and return in 18 minutes. Find the rate of current ? 6498 05b5cc6ebe4d2b4197774ee46
5b5cc6ebe4d2b4197774ee46- 11/3 kmphfalse
- 22/3 kmphfalse
- 31/4 kmphfalse
- 41/2 kmphtrue
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उत्तर : 4. "1/2 kmph"
व्याख्या :
Answer: D) 1/2 kmph Explanation: Speed in upstream = Distance / Time = 3 x 60/20 = 9 km/hr. Speed in downstream = 3 x 60/18 = 10 km/hr Rate of current = (10-9)/2 = 1/2 km/hr.
प्र:In these questions read each sentence to find out whether there is any error in it. If there is no error, the answer is (D).
I saw him (A)/ a couple of times (B)/ since May. (C) No error (D).
6496 05da84deea065590cb2720ff0
5da84deea065590cb2720ff0- 1Atrue
- 2Bfalse
- 3Cfalse
- 4Dfalse
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उत्तर : 1. "A"
प्र: Which of the following statements is correct concerning hypnosis? 6493 05b5cc636e4d2b4197774ba29
5b5cc636e4d2b4197774ba29- 1A hypnotized person is in an involuntary condition of suggestion.false
- 2A person who is under hypnosis is really in control of his or her behavior.true
- 3The hypnotist is always in control.false
- 4People will do things they would not ordinarily do when under hypnosis.false
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उत्तर : 2. "A person who is under hypnosis is really in control of his or her behavior."
व्याख्या :
Answer: B) A person who is under hypnosis is really in control of his or her behavior. Explanation:
प्र: प्रॉक्सी सर्वर का प्रयोग निम्नलिखित में से किसके लिए किया जाता है ?
6490 061b8b8283dcf35035ce1af04
61b8b8283dcf35035ce1af04- 1अनाधिकृत प्रयोक्ताओं के खिलाफ सुरक्षा प्रदान करनाfalse
- 2वेब पेजों के लिए क्लाइन्ट रिक्वेस्ट को प्रोसेस करनाfalse
- 3डाटाबेस एक्सेस के लिए क्लाइन्ट रिक्वेस्ट को प्रोसेस करना ।false
- 4TCP / IP उपलब्ध करानाfalse
- 5उपरोक्त में से कोई नहींtrue
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उत्तर : 5. "उपरोक्त में से कोई नहीं"
प्र: Rashmi started from her home & Walked 5 km. straight in the West. Then she turned to the right & walked 3 km. Then she turned to the right & walked 3 km. Then she tuned to the left & walked 2 km. Again, she turned to the left & walked 3 km. & then walked 3 km. after turning to the right finally. In which direction is she now from her home? 6486 05bdfff96c1927812d6e1a012
5bdfff96c1927812d6e1a012- 1Westtrue
- 2Northfalse
- 3Southfalse
- 4Eastfalse
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उत्तर : 1. "West"
प्र: What is one benefit of lifelong physical activity? 6485 05b5cc64ae4d2b4197774bbf1
5b5cc64ae4d2b4197774bbf1- 1high blood pressurefalse
- 2increase in healthy eating habitsfalse
- 3high physiological agetrue
- 4prevention of weight gainfalse
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उत्तर : 3. "high physiological age"
व्याख्या :
Answer: C) high physiological age Explanation:
प्र: किस प्रकार के बैंकिंग, इलेक्ट्रॉनिक वित्तीय लेन-देन किए जाते हैं?
6484 05e785f3af012602a3def3b9c
5e785f3af012602a3def3b9c- 1ई-बैंकिंगtrue
- 2पीओएस बैंकिंगfalse
- 3एम-बैंकिंगfalse
- 4यूनिवर्सल बैंकिंगfalse
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