JEE Advanced 2020 Concept Recapitulation Test 4 Paper 2

Sunset is defined as the instant that the top of the sun dissappears below the horizon. How long is it from the time when the bottom of the sun hits the horizon until the instant of sunset assuming that you are standing on the equator on March 21? Call this time tanset and find it in seconds. Take diameter of Sun=14×108m and sun-earth distance =1.5×1011m.( take π=3.15)