7. Two poles 1 and 2 each, exactly one meter above the Earth, have been placed vertically at two points A and B. Pole 2 is at a distance s=794 km from pole 1, directly south of it. At noon, pole 1 does not cast any shadow while pole 2 casts a shadow on the ground, 126 mm long, to the south. From these data, could you estimate the length of the circumference of the Earth (assuming that the Earth can be approximated by a perfect sphere)? State your estimate.
7. Two poles 1 and 2 each, exactly one meter above the Earth, have been placed vertically at two points A and B. Pole 2 is at a distance s=794 km from pole 1, directly south of it. At noon, pole 1 does not cast any shadow while pole 2 casts a shadow on the ground, 126 mm long, to the south. From these data, could you estimate the length of the circumference of the Earth (assuming that the Earth can be approximated by a perfect sphere)? State your estimate.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:7. Two poles 1 and 2 each, exactly one meter above the Earth, have been placed vertically at
two points A and B. Pole 2 is at a distance s=794 km from pole 1, directly south of it. At
noon, pole 1 does not cast any shadow while pole 2 casts a shadow on the ground, 126 mm
long, to the south. From these data, could you estimate the length of the circumference of the
Earth (assuming that the Earth can be approximated by a perfect sphere)? State your estimate.
N
baue= 0.126
1
Trad
0. 12 534Sad →
1 rad >?
0,12 SM
の
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