Usta ishni 4 kunda, shogirdi esa 5 kunda tugatadi. Usta 3 kun ishlaganidan keyin shogirti yordamga kelsa, jami ish qancha vaqtda tugaydi?

  1. 9
  2. ³²/₉
  3. ³²/₅
  4. ³²/₁₁

📝 Detailed explanation

Usta 3 kunda ishning ³/₄ qismini bajaradi va ishning ¹/₄ qismi qoladi. Usta va shogird birgalikda bir kunda ishning ¹/₄ + ¹/₅ = ⁹/₂₀ qismini bajarishadi. Qolgan ishni tugatish uchun ¹/₄ ÷ ⁹/₂₀ = ⁵/₉ kun kerak. Jami vaqt: 3 + ⁵/₉ = ³²/₉ kun.
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