Comprehension

Directions for Questions : Study the information below and answer questions based on it.

A certain race is made up of three stretches A, B and C, each 2 km long, and to be covered by a certain mode of transport. The following table gives these modes of transport for the stretches, and the minimum and maximum possible speeds (in kmph) over these stretches. The speed over a particular stretch is assumed to be constant. The previous record for the race is ten minutes.

CAT/1997

Question . 296

Mr. Tortoise completes the race at an average speed of 20 kmph. His average speed for the first two stretches is 4 times that for the last stretch. Find his speed over stretch C