**Question:**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 km/hr) over these stretches. The speed over a particular stretch is assumed to be constant. The previous record for the race is 10 min.

Min. | Max. | ||

A | Car | 40 | 60 |

B | Motorcycle | 30 | 50 |

C | Bicycle | 10 | 20 |

Mr Tortoise completes the race at an average speed of 20 km/hr. His average speed for the first two stretches is four times that for the last stretch. Find the speed over stretch C.

- 15 km/hr
- 12 km/hr
- 10 km/hr
- This is not possible

## CAT Quant Questions with Video Solutions

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