Assuming the petrol burnt per hours in driving a motor boat varies as the cube of its velocity, show that the most economical speed when going against a current of c km per hour is `(3c )/(2)` km per hour.

Assuming that the petrol burnt per hour in driving a motor boat varies as the cube of its velocity, show that the most economical speed when going against a current of c km/hour is (3c)/(2) km/hour.

Assuming the petrol burnt (per hour) in driving a motor boat veries as the cube of its velocity, show that the most economical speed when going against the current of c miles per hour is ((3c)/2) miles per hour.

Assuming the petrol burnt (per hour) in driving a motor boat veries as the cube of its velocity,show that the most economical speed when going against the current of c miles per hour is ((3c)/(2)) miles per hour.

Assume that the cost of the petrol burnt (per hour) in driving a motor boat varies as the cube of its velocity. Show that the most economical speed of the boat when going against a current of 6km per hour is 9km. Per hour.

If the petrol burnt per hour in driving a motor boat varies as the cube of it's velocity when going against a current of C .KMPH the most economical speed is

A speed of 45 km per hour is the same as

The distance (in km) travelled in h hours at a constant speed of 40 km per hour is

The cost of fuel of an engine varies as the square of its velocity and the cost of fuel is ₹ 48 per hour when the velocity is 16 km per hour. If other expenses be ₹ 300 per hour, then show that the most economical velocity for a journey of a given distance is 40 km per hour.