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

[EX Q]: 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 .
[EX A]: 2 hr 24 mins

[EX Q]: Problem: what is the dividend . divisor 13 , the quotient is 17 and the remainder is 1
[EX A]: 222

[EX Q]: Problem: how long does a train 110 m long running at the speed of 72 km / hr takes to cross a bridge 136 m length ?
[EX A]:
12.3 sec