No, Sri Lanka is not further west than the prime meridian (zero degrees latitude).
Yes, Sri Lanka is further east than the prime meridian (zero degrees latitude). The midpoint of Sri Lanka is further east by approximately 5,469 miles (8,802km).
Yes, Sri Lanka is further north than the equator. The midpoint of Sri Lanka is further north by approximately 544 miles (875km).
No, Sri Lanka is not further south than the equator.