The task is to generate the correct answer for a given math problem.

Ex Input:
Problem: a train covers a distance of 100 km in 1 hour . if its speed is decreased by 10 km / hr , the time taken by the car to cover the same distance will be ?

Ex Output:
1 hr 6 min


Ex Input:
Problem: a worker is paid a regular rate of rs . 30 for completing a survey . the worker completes 100 surveys per week . for any survey involving the use of her cellphone , she is paid at a rate of that is 20 % higher than her regular rate . if she completed 50 surveys involving the use of her cellphone , how much did she get that week ?

Ex Output:
330


Ex Input:
Problem: the sector of a circle has perimeter of 144 cm and central angle 180 o . find its radius ?

Ex Output:

28 cm