The total cost of the train to travel 500 km at the most economical speed is:

(a) ₹ 3750     (b) ₹ 75000   (c) 7500   (d) 15000  

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Question 50 The total cost of the train to travel 500 km at the most economical speed is: (a) ₹ 3750 (b) ₹ 75000 (c) 7500 (d) 15000 Now, Total Cost = 𝟑𝟕𝟓/𝟒 𝒗 + 𝟔𝟎𝟎𝟎𝟎𝟎/𝒗 Putting v = 80 = 𝟑𝟕𝟓/𝟒 × 𝟖𝟎 + 𝟔𝟎𝟎𝟎𝟎𝟎/𝟖𝟎 = 7500 + 7500 = Rs 15,000 So, the correct answer is (d)

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.