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If (A(t)=280-13t) and (B(t)=65+5t), when will (A(t)) be (17) more than (B(t))?यदि (A(t)=280-13t) और (B(t)=65+5t), तो (A(t)) कब (B(t)) से (17) अधिक होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(t=11\)\(t=11\)
“17 more” means \(A(t)=B(t)+17\). Therefore, \(280-13t=65+5t+17\), which gives \(198=18t\) and hence \(t=11\). Substituting \(t=10\) gives a difference of 35, not 17. Exam tip: In “more than” questions, first write the difference between the two quantities.“17 अधिक” का अर्थ है \(A(t)=B(t)+17\)। अतः \(280-13t=65+5t+17\), जिससे \(198=18t\) और \(t=11\) प्राप्त होता है। \(t=10\) रखने पर अंतर 35 होता है, 17 नहीं। परीक्षा टिप: “से अधिक” वाले प्रश्नों में पहले दोनों राशियों का अंतर लिखें।
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