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If (A(t)=170-9t) and (B(t)=38+4t), when will (A(t)) be (2) more than (B(t))?यदि (A(t)=170-9t) और (B(t)=38+4t), तो (A(t)) कब (B(t)) से (2) अधिक होगा?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: \(t=10\)\(t=10\)
“2 more than \(B(t)\)” means \(A(t)=B(t)+2\). So, \(170-9t=38+4t+2\), which gives \(170-9t=40+4t\) and \(130=13t\). Hence, \(t=10\). At \(t=9\), the difference is 15, not 2. Exam tip: In comparison questions, first convert the stated difference into an equation.“\(B(t)\) से 2 अधिक” का अर्थ है \(A(t)=B(t)+2\)। अतः \(170-9t=38+4t+2\), जिससे \(170-9t=40+4t\) और \(130=13t\) मिलता है। इसलिए \(t=10\) है। \(t=9\) रखने पर अंतर 15 आता है, 2 नहीं। परीक्षा टिप: “से अधिक” वाले प्रश्नों में पहले अंतर को समीकरण के रूप में लिखें।
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