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1). 40 minutes2). 50 minutes3). 42 minutes4). 45 minutes |
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Answer» It is understood that SCHOOL can be open for only FIXED number of hours No. of school hours = 6 × 60 = 360 minutes Let duration of each period in new schedule be X minutes ⇒ 360 = 9 × X ⇒ X = 360/9 ∴ X = 40 minutes |
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