Test SeriesFree PYQsExamsPricing

JEE Main 2013 Mathematics question

MathematicsApplication of DerivativesJEE Main 2013

The cost of running a bus from A to B is Rs. (av + b/v) where v km/h is the average speed of the bus. When the bus travels at 30 km/h, the cost comes out to be Rs. 75 while at 40 km/h, it is Rs. 65. Then the most economical speed (in km/h) of the bus is :

Answer: (3)

Solution

and give and , so , b =

See the full step-by-step solution

Create a free account to read the complete working, and practise questions like this in a timed test.

Create a free account

Question ID VK-104157