Yes, a one day Braj visit is possible, but bus details from Coimbatore still need checking. Start at dawn with Banke Bihari, cover the old town cluster before the midday closure, rest through the afternoon, and end with the Yamuna aarti at Kesi Ghat. If you are looking at one day tour packages from Coimbatore by bus, you are probably asking two things: can Vrindavan and Mathura be seen...