instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: a man whose speed is 4.5 kmph in still water rows to a certain upstream point and back to the starting point in a river which flows at 1.5 kmph , find his average speed for the total journey ?
answer:
4


question:
Problem: a question paper has 2 parts , a & b , each containing 8 questions . if a student has to choose 8 from part a & 4 from part b , in how many ways can he choose the questions ?
answer:
70


question:
Problem: the radius of a wheel is 22.4 cm . what is the distance covered by the wheel in making 2000 resolutions ?
answer:

2816 m