Physics, asked by tarique6517, 7 months ago

6. An electric iron is used for ironing clothes is marked 400 Watt and 220 Volts. What is the resistance when the Iron is hot? How long it could be used for Rs 100 if Electrical energy cost Rs 10 per unit?

Answers

Answered by shijithpala

9

Answer:

25hr. R=121

Explanation:

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2,400 रु. की धनराशि, किसी निश्चित ब्याज-दर से 4 वर्षों में बढ़कर 3264 रु. हो जाती है. यदि ब्याज-दर में 1% की वृद्धि कर दी जाए, तो वही धनराशि उतने ही समय में बढ़कर कितनी हो जाएगी?; ∴ साधारण व्याज; = 3264 – 2400; = Rs. 864; ∴ S. I. =; 864 =; R =; R = 9; ∴ दर = 9%; ∴ दर में 1% की वृद्धि के बाद नई दर; = (9 + 1)% = 10%; ∴ S. I. =; = Rs. 960; ∴ अभीष्ट राशि; = 2400 + 960; = Rs. 3360 A. 3260 B. 3310 C.