A person on a ship sailing north sees tw...

A person on a ship sailing north sees two lighthouses which are 6 km apart, in a line due west . After an hour's tailing one of them bears south west and the other southern south west. The ship is travelling at a rate of

12 km/hr

6 km/hr

`3sqrt2` km/hr

`(6+3sqrt2)` km/hr

Text Solution

Verified by Experts

The correct Answer is:

Topper's Solved these Questions

HEIGHTS AND DISTANCES
OBJECTIVE RD SHARMA ENGLISH|Exercise Exercise|45 Videos
EXPONENTIAL AND LOGARITHMIC SERIES
OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|20 Videos
INCREASING AND DECREASING FUNCTIONS
OBJECTIVE RD SHARMA ENGLISH|Exercise Chapter Test|18 Videos

Similar Questions

Explore conceptually related problems

A person 'P' in train moving due south with 80 kmph and his friend Q moving due west at 60 kmph Q finds that P is travelling with a velocity of

Two persons stand near a railway line separated by a distance 2 km. A detonator is exploded by the first person. The second person 2 km away hears two sounds, one from the sound that has travelling through the rail and the other through the air. What is the interval between them? Given Young's modulus of steel = 2 xx 10^11 N//m^2. Density of steel = 8000 kg/m ""^3. Density of air = 1.29 kg/m ""^3. Atmospheric pressure =1 xx 10^(2) N//m^2. y for air = 1.4

Two trains one travelling at 54 kmph and the other at 72 kmph are headed towards one an other along a straight track. When they are 1/2 km apart, both drivers simultaneously see the other train and apply their brakes. If each train is decelerated at the rate of 1 ms^(-2) , will there be collision ?

The streets of a city are arranged like the like the lines of a chess board. There are m streets running from north to south and n streets from east to west. Find the number of ways in which a man can travel from north-west to south-east corner, covering shortest possible distance.

Two trains leave a railway station at the same time. The first train travels towards west and the second train towards north. The first train travels 5 km/hr faster than the second train. If after two hours they are 50 km apart find the average speed of each train.

OBJECTIVE RD SHARMA ENGLISH-HEIGHTS AND DISTANCES-Exercise

If the elevation of the sun is 30^@ , then the length of the shadow c...
Text Solution
|
A ladder rests against a vertical wall at angle alpha to the horizonta...
Text Solution
|
From the top of a cliff 300 metres high, the top of a tower was obser...
Text Solution
|
The angles of elevation of the top of a tower at the top and the foot ...
Text Solution
|
A person standing on the bank of a river finds that the angle of elev...
Text Solution
|
A tower subtends an angle of 30^@ at a point on the same level as the ...
Text Solution
|
AB is a vertical pole. The end A is on the level ground .C is the midd...
Text Solution
|
The angle of depression of a point situated at a distance of 70 metres...
Text Solution
|
The angle of elevation of the top of a vertical tower from two points ...
Text Solution
|
An aeroplane flying horizontally 1 km above the ground is observed ...
Text Solution
|
about to only mathematics
Text Solution
|
At a distance 12 metres from the foot A of a tower AB of height 5 met...
Text Solution
|
A tower 50 m high , stands on top of a mount, from a point on the grou...
Text Solution
|
A person on a ship sailing north sees two lighthouses which are 6 km a...
Text Solution
|
An observer finds that the elevation of the top of a tower is 22.5^@ a...
Text Solution
|
A vertical lamp-post, 6m high, stands at a distance of 2 m from a wall...
Text Solution
|
The angle of elevation of the top of a vertical pole when observed ...
Text Solution
|
The upper 3/4 th portion of a vertical pole subtends an angle theta su...
Text Solution
|
A person standing on the bank of a river observes that the angle of ...
Text Solution
|
A tower subtends angles alpha,2alpha,3alpha respectively, at point A ,...
Text Solution
|