201761 marks18 questions
1 of its 18 questions are here. The rest have a figure or are still being checked, so for now they're only in the official PDF.
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Source: JEE (Advanced) 2017, Paper 2, Physics, published by JEE (Advanced). The official PDF
A person measures the depth of a well by measuring the time interval between dropping a stone and receiving the sound of impact with the bottom of the well. The error in his measurement of time is δT = 0.01 seconds and he measures the depth of the well to be L = 20 meters. Take the acceleration due to gravity g = 10 ms⁻² and the velocity of sound is 300 ms⁻¹. Then the fractional error in the measurement, δL/L, is closest to