Hey Kalyan, the answer is in you. To write a good essay in a certain time provided, it requires your long term effort to constantly practice writing with time limit applied (if you intend to involve in any kind of writing test). Timing yourself for your writing habit will give you a proper understanding on how well you can handle with your own writing ability.
As the test is about a month period to come, for your own good I think you should practice to write on one topic each day and time it. You need to catch up with your pace of writing and try to speed it up gradually until you are convinced that at what pace that allows you to write a good piece of essay and in a contented timing.
go for it
and wish u luck,
Linda
