The phrase "answered about how" is not correct and sounds awkward in written English.
It can be used when referring to someone responding to a question regarding a method or process, but it would be better to rephrase it for clarity.
Example: "She answered about how the project would be completed, but her explanation was unclear."
Alternatives: "responded regarding how" or "explained how".
The technical problems that emerged have raised questions — still not entirely answered — about how much the president's aides knew, or should have known, about the site's troubles.
He and other experts suggest that despite the verdict, there are serious questions still to be answered about how street crime units should operate.
"Questions must now be asked and answered about how such a tragedy was able to occur and how we can prevent another happening in the future," Mr. Key said.
Profitable banks have other carrots to dangle, too: they are likely to increase dividend payouts and resume buying back stock once lingering questions are answered about how much regulatory capital and liquid assets they need.
"The facts and figures that I have set out show that there are certainly questions to be answered about how men are treated in the justice system, compared with women," he said.
There are certainly many questions to be answered about how the Peace Agreement will work going forward and if the country will live up to its potential of being a growing and stable emerging market economy in years to come.
It is clear that Cambridge Analytica has serious questions to answer about how it harvested and used data.
As the two converge, there will be awkward questions to answer about how and by whom broadband services will be regulated in future.
"There are now mounting questions for the Government to answer about how the Co-op Bank got into trouble on its watch.
Rick Wilson said that the conservative media, and the established media generally, had questions to answer about how they gave him a pass.
There are questions we cannot answer about how gravity behaves under certain experimental conditions.
