instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: find the cost of fencing around a circular field of diameter 16 m at the rate of rs . 3 a meter ?
answer:
150.84


question:
Problem: a snooker tournament charges $ 45.00 for vip seats and $ 20.00 for general admission ( “ regular ” seats ) . on a certain night , a total of 320 tickets were sold , for a total cost of $ 7500 . how many fewer tickets were sold that night for vip seats than for general admission seats ?
answer:
276


question:
Problem: a train running at the speed of 20 km / hr crosses a post in 10 seconds . what is the length of the train ?
answer:

200