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08/28/2023 · High School

1. Nasaf-Ziyo o`quv markazida ustozlari Abrorbek va Ramazon 5 xil darajadagi masalalarni yechishlari kerak. Bu 5 ta masalani yechish uchun ketadigan vaqtlar: \( 40,15,3 \) 10,45 minutlarni tashkil qiladi. 1 kishi bir vaqtning o'zida 1 ta masalani tugatib keyin 2 -siga o'tishi mumkin. Bu ikki ustoz barcha masalalarni qanday eng qisqa vaqtda yecha oladi? \[ \begin{array}{llll}\text { A) } 70 & \text { B) } 75 & \text { C) } 80 & \text { D) } 85\end{array} \]

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Ustozlar Abrorbek va Ramazon 5 ta masalani yechishlari kerak. Masalalarni yechish uchun ketadigan vaqtlar: 40, 15, 3, 10, 45 minut. Ustozlar bir vaqtning o'zida bir masalani yechishlari mumkin, shuning uchun masalalarni yechish jarayonini optimallashtirishimiz kerak. Masalalarni yechish uchun vaqtlarni tartibga solamiz: 1. 3 minut 2. 10 minut 3. 15 minut 4. 40 minut 5. 45 minut Ustozlar masalalarni yechish jarayonini quyidagicha taqsimlashimiz mumkin: - Abrorbek 3 minut va 45 minutli masalalarni yechadi. - Ramazon 10 minut, 15 minut va 40 minutli masalalarni yechadi. Ustozlar masalalarni yechish vaqtlarini hisoblaymiz: - Abrorbek: 3 + 45 = 48 minut - Ramazon: 10 + 15 + 40 = 65 minut Endi, ikkala ustozning masalalarni yechish vaqtlari orasidagi eng uzun vaqtni olamiz: - 65 minut (Ramazon) + 3 minut (Abrorbekning 1-masalasi) = 65 minut - 48 minut (Abrorbek) + 10 minut (Ramazonning 1-masalasi) = 58 minut - 48 minut (Abrorbek) + 15 minut (Ramazonning 2-masalasi) = 63 minut - 48 minut (Abrorbek) + 40 minut (Ramazonning 3-masalasi) = 88 minut Shunday qilib, eng qisqa vaqt 65 minut bo'ladi. Natijada, ustozlar barcha masalalarni eng qisqa vaqtda yechishlari mumkin: **Javob: B) 75 minut**

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Ustozlar barcha masalalarni eng qisqa vaqtda yecha oladilar, bu vaqt 75 minutni tashkil qiladi.
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