A truck is to be driven 300 km on a highway at a constant speed of x kmph. Speed rules of…
Mathematics · JEE Main · NTA Exams — Limit, Continuity and Differentiability
A truck is to be driven 300 km on a highway at a constant speed of x kmph. Speed rules of the highway required that 30 ≤ x ≤ 60. The fuel costs Rs. 10 per litre and is consumed at the rate of \(2+\frac{x^{2}}{600}\)liters per hour. The wages of the driver are Rs. 200 per hour. The most economical speed to
drive the truck, in kmph, is
drive the truck, in kmph, is
- 30
- 60
- \(\text { (b) } \sqrt{3.3}\)
- \(\varnothing \sqrt{3.3}\)
Answer
(B) 60
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