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Let the total number of students in school B be ‘x’. Therefore, total number of students in school A = 1.2x Number of boys in school A = 0.80 × 1.2x = 1.96x Number of boys in school B = 0.6x Required % = [(1.96x – 0.6x)/0.6x] × 100 = 60%
The length of the shadow of a vertical tower increases by 8 m on horizontal ground when the height of the sun changes from 45° to 30 ° , then find the...
Two men are on opposite sides of a tower of 75 m height. If they measure the elevation of the top of the tower as 30deg; and 45deg; respectively then th...
The shadow of a pole on ground level is increased by 24 m when the angle of depression of the sun changes from 60° to 30°. What is the height of the p...
From a watch tower of 205 m height, the angles of depression of two cliffs in a horizontal line through the base of the tower are 45° and 30°. Find th...
The shadow of a pole 24m long is 56m. Then what will be the approximate shadow of building 40m high at the similar situation?
The angle of elevation of a ladder leaning against a wall is 60° and the foot of the ladder is 5 m away from the wall. The length of the ladder
A pole 6 m high casts a shadow 2√3 m long on the ground. Find the angle of elevation
A tree of height 'h' meters is partially bent at a certain point above the ground, causing its top to touch the ground at a distance of 12 meters from i...
A boat is being rowed away from a cliff 240 m high. From the top of the cliff, the angle of depression of the boat changes from 60° to 45° in 3 ...
A vertical tower stands on a horizontal plane and is surmounted by a vertical flag staff of height h. At a point on the plane, the angle of elevation of...