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

Input: Consider Input: Problem: one fast typist type some matter in 4 hrs and another slow typist type the same matter in 6 hrs . if both do combine in how much time they will take to finish .

Output: 2 hr 24 mins


Input: Consider Input: Problem: a and b invests rs . 10000 each , a investing for 6 months and b investing for all the 12 months in the year . if the total profit at the end of the year is rs . 24000 , find their shares ?

Output: 8000


Input: Consider Input: Problem: a boy swims downstream 56 km and upstream 42 km taking 7 hours each time ; what is the speed of the current ?


Output: