The time required to double the population of microorganisms is
Generation time  is the time it takes for a population of bacteria to double in number
The distance between two parallel poles is 65√3m. The angle of depression of the top of the second pole when seen from the top of first pole is 30...
The angle of elevation of an aeroplane from a point on the ground is 60°. After 20 seconds flight the elevation changes to 30°, if the aeroplane...
There is a 12 m tall hoarding pole on the top of a building. A person at some distance from the building, observes that the angle of elevation to the to...
Two buildings are collinear with the base of a tower and are at a distance 9m and 16m from the base of the tower. The angles of elevation from these two...
At a point 20 metres away from the base of a 20√3, metres high house, the angle of elevation of the top isÂ
The angle of elevation of the top of a building from the foot of a tower is 30° and the angle of elevation of the top of the tower from the foot of the...
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...
There are two houses of the same height on both sides of a 15-meter wide road. From a point on the road, elevation angles of the houses are 30° and 60Â...
A man 3 m tall is 23 m away from a tower 26 m high. Determine the angle of elevation of the top of the tower from the eye of the observer.
The length of the shadow of a vertical tower increases by 9 m on horizontal ground when the height of the sun changes from 45° to 30 ° , then fi...