Question

A lamp at the top of a lighthouse is visible just
above the horizon from a station at sea level. The
distance of the lamp from the station is 30 km. The
height of the lighthouse is​

Answer 1

Step-by-step explanation:

0000000000000000000.20km

Answer 2

Step-by-step explanation:

Given A lamp at the top of a lighthouse is visible just above the horizon from a station at sea level. The distance of the lamp from the station is 30 km. The height of the lighthouse is

• Now the concept used is combined error due to curvature and refraction. So we have
• Error due to curvature is 0.07857 x d^2
• Error due to refraction is -0.01122 x d^2
• Combined error = curvature + refraction
•                            = d^2 (0.07857 – 0.01122)
• So combined error = 0.06735 x d^2 where d is the distance travelled on the surface of the earth.
• Also distance d = 3.855 x √h
• Or h = 0.06735 x d^2
• Given distance of the lamp from the station is 30 km.
• Height of the light house will be
•                                    = 0.06735 x d^2
•                                            = 0.06735 x 30^2
•                                           = 0.06735 x 900
•                                          = 60.615 m

Reference link will be

https://brainly.in/question/49564307