CBSE Guess > Papers > Question Papers > Class X > 2008 > Mathematics > Mathematics As observed from the top of a lighthouse, 100 m high above sea level, the angle of depression of a ship sailing directly towards it, changes from 30°
to 60°. Determine the distance travelled by the ship during the period of observation. Sol. Let AB be the lighthouse, C and D be the two points Q. 28. Prove that the ratio of the areas of two similar triangles is equal to the ratio of squares of their corresponding sides. Using the above result, prove the following : Sol.
CBSE 2008 Question Papers Class X
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