A cylindrical tank has a radius of 4 meters and a height of 10 meters. If the tank is filled with water, how much water (in cubic meters) does it hold?
A cylindrical tank has a
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\( w = 7 \)
الطول = \( 7 + 3 = 10 \).
#### 7 (عرض)، 10 (طول)
تسافر قطار من المدينة أ إلى المدينة ب بسرعة متوسطة تبلغ 60 كم / ساعة وتعود بسرعة 40 كم / ساعة. إذا كان إجمالي وقت السفر 5 ساعات، فما المسافة بين المدينتين؟
لتكن المسافة \( d \) كم.
الوقت من أ إلى ب = \( \frac{d}{60} \)
الوقت من ب إلى أ = \( \frac{d}{40} \)
إيجاد مقام مشترك: \( \frac{2d}{120} + \frac{3d}{120} = 5 \)
\( \frac{5d}{120} = 5 \)
\( d = 120 \).