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From a mountain peak 42 m high, the angles of depression to the ends of a lake directly in the line of sight are 30 deg and 60 deg respectively. Find the length of the lake. a. 28/3 423 b. 3 V3 C. 42 d.

From a mountain peak 42 m high, the angles of depression to the ends of a lake directly in the line of sight are 30 deg and 60 deg respectively. Find the length of the lake. a. 28/3 423 b. 3 V3 C. 42 d.

Advanced Engineering Mathematics
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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From a mountain peak 42 m high, the angles of depression to the ends of a lake directly in the line of sight are 30 deg and 60 deg respectively. Find the length of the lake. а. 28/3 42/3 b. 3 v3 с. 42 42 d. 3 From a ship at sea the angles of elevation of the base and top of a lighthouse 30 m high at the cliff's edge are 60 deg and 45 deg. Find the distance of the cliff from the ship. 30 (v3+1) а. 2 b. 30(V3 + 1) 30 C. 2( V3+1) d. 2( v3 + 1)
Transcribed Image Text:From a mountain peak 42 m high, the angles of depression to the ends of a lake directly in the line of sight are 30 deg and 60 deg respectively. Find the length of the lake. а. 28/3 42/3 b. 3 v3 с. 42 42 d. 3 From a ship at sea the angles of elevation of the base and top of a lighthouse 30 m high at the cliff's edge are 60 deg and 45 deg. Find the distance of the cliff from the ship. 30 (v3+1) а. 2 b. 30(V3 + 1) 30 C. 2( V3+1) d. 2( v3 + 1)
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