For this case what you should do is find the volume of the tank in the form of a cylinder.
 By definition, the volume of a cylinder is:
 V = pi * (r ^ 2) * (h)
 Where,
 h: height
 r: radio
 Substituting the values we have:
 V = 3.14 * ((24/2) ^ 2) * (10)
 V = 4521.6 kL
 Answer:
 If the tank is full, it does contain 4521.6 kL of oil