1. The shadow of a tower standing on a level ground is found to be 40 metre longer when the suns altitude is 30° than when it is 60°. Find the length of the tower,





Write Comment

Type in
(Press Ctrl+g to toggle between English and the chosen language)

Comments

  • By: anil on 05 May 2019 01.53 am
    We know that, length of shadow will be equal to the adjacent side and the height of tower is the opposite side of the triangle.
    We have been given that difference in lengths of shadows = 40m.
    Length of shadow = h tan A.
    h tan 60 - h tan 30 = 40
    h√3 - h/√3 = 40
    (3h -h)/√3 = 40
    2h = 40√3
    h = 20√3 m.
    Option A is the right answer.
Tags
Show Similar Question And Answers
QA->A is taller than B; B is taller than C; D is taller than E and E is taller than B. Who is the shortest?....
QA->Tallest free standing structure (tower) in the world ?....
QA->Which city is at the highest altitude above mean sea level....
QA->Which city is at the highest altitude above mean sea level?....
QA->Which city is at the highest altitude above mean sea level ?....
MCQ->The shadow of a tower standing on a level ground is found to be 40 metre longer when the suns altitude is 30° than when it is 60°. Find the length of the tower,....
MCQ->Read the following passage carefully and choose the most appropriate answer to the question out of the four alternatives. The Eiffel Tower is an iron lattice tower located on the Champ de Mars in Paris. It was named after the engineer Gustave Eiffel, whose company designed and built the tower. Erected in 1889, it was initially criticised by some of France's leading artists and intellectuals for its design, but has become both a global cultural icon of France and one of the most recognisable structures in the world. The tower is the tallest structure in Paris and the most visited monument in the world 6.98 million people ascended it in 2011. The tower received its 250 millionth visitor in 2010. The tower is 324 metres, about the same height as an 81-storey building. During its construction, the Eiffel Tower surpassed the Washington Monument to assume the title of the tallest man-made structure in the world. The tower has three levels for visitors, with restaurants on the first and second. Tickets can be purchased to ascend by stairs or lift to the first and second levels. Although there are stairs to the third and highest level, these are usually closed to the public and it is generally only accessible by lift. As a global landmark, the Eiffel Tower is featured in media including films, video games, and television shows. Which statement truly reflects the status of the Eiffel Tower?....
MCQ-> Study the following information carefully and answer the questions given below :Ten persons - L, M, N, O, P, Q, R, S, T and U - are standing in a straight line facing north, but not necessarily in the same order. Four persons are standing between Q and S. P is standing at one of the extreme ends. L is standing to the immediate right of Q. L is standing second to the left of P. U is standing second to the right of S and second to the left of N. Three persons are standing between R and M. O is not standing at any extreme end of the line. M is far away from O than that of P.Who among them standing at extreme left end ?
 ....
MCQ->How far and in which direction is point L from point P ? I. Point M is 5 metre to the south of point L. Point N is 7 metre to the east of point M. Point O is 5 metre to the north of point N. Point P is 5 metre to the east of point O. II. Point L is 19 metre to the west of point S. Point S is 5 metre to the north of point R. Point Q is 7 metre to the west of point R. Point P is to the north of point Q such that point Q and point P form a straight line of 5 metres.....
MCQ->Statements: All suns are stars. All moons are stars. Some planets are suns. Some stars are gases. Conclusions: I. Some stars are planets. II. Some suns are gases. III. No moon is a planet. IV. Some gases are moons.....
Terms And Service:We do not guarantee the accuracy of available data ..We Provide Information On Public Data.. Please consult an expert before using this data for commercial or personal use
DMCA.com Protection Status Powered By:Omega Web Solutions
© 2002-2017 Omega Education PVT LTD...Privacy | Terms And Conditions