What is the time limit to answer a question in musing?
Answering a question on Musing is not only limited to the answer you post but also the time you posted your answers. It is always advisable you post your answer on that same day you viewed a question you are capable of answering.
There are tons of users who asks questions every minute and also there are lot of users who are also ready to provide quality answers to questions. It is advisable not to procrastinate when answering questions on Musing or postponing the question you can answer today till the next day. The fact is that the curators are working very hard to curate each answers provided per day. Musing then gives upvote to the eligible ones with the help of the curators.
If you want to get upvoted, don't postpone questions being asked today by providing answers to it the coming days because users who provided quality answers to that same question will surely be upvoted and the curators may assume the questions has been answered and everyone is upvoted.
There is also a high chance of you getting upvote for providing answer to a particular question which no other user was able to answer except you without forgetting to implement quality write up in such answer. Also, some recognized Musiing users may also be upvoted irrespective of the time they answer because the team are rewarding them for their consistent effort and hardwork on the platform.
In conclusion, it is always advisable to answer questions which were asked on a particular day on that same day so that you get rewarded with other users who also provided answers to that same question without neglecting your quality write up other than postponing your time of answering till another time.