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2 minutes 30 seconds of internet download bill is 18 rupees, then how much will be the bill of 3 minutes 20 seconds? (Up to one decimal place)A. 24B. 24.1C. 24.2D. 23.91. B2. D3. A4. C |
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Answer» Correct Answer - Option 3 : A Given: Bill for 2 minutes 30 seconds = Rs. 18 Calculations: 2 minutes = 2 × 60 ⇒ 120 seconds 2 minutes 30 seconds = 120 + 30 ⇒ 150 seconds Cost of 150 seconds = Rs. 18 ⇒ Cost of 1 second = 18/150 3 minutes = 3 × 60 ⇒ 180 seconds 3 minutes 20 seconds = 180 + 20 ⇒ 200 seconds Cost of 200 seconds = (18/150) × 200 ⇒ 3600/150 ⇒ Rs. 24 ∴ The bill of 3 minutes 20 seconds is Rs. 24. |
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