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If (U(t)=120-10t), when will (U(t)=50)?यदि (U(t)=120-10t), तो (U(t)=50) कब होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(t=7\)\(t=7\)
Given \(U(t)=120-10t\). For \(U(t)=50\), set \(120-10t=50\). Thus, \(-10t=-70\), so \(t=7\). If \(t=6\), then \(U(t)=60\), not 50. Exam tip: isolate the variable term by performing the same operation on both sides of a linear equation.दिया है \(U(t)=120-10t\)। जब \(U(t)=50\), तब \(120-10t=50\)। अतः \(-10t=-70\), इसलिए \(t=7\)। विकल्प \(t=6\) रखने पर \(U(t)=60\) मिलता है, 50 नहीं। परीक्षा टिप: रैखिक समीकरण में चर वाले पद को अलग करने के लिए दोनों पक्षों में समान संक्रिया करें।
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