CameraIcon

SearchIcon

MyQuestionIcon

5

You visited us 5 times! Enjoying our articles? Unlock Full Access!

Quantitative Aptitude

Triangles

A lighthouse ...

Question

A lighthouse facing north, sends out a beam of light extending from north-east to the north-west. An observer on a steamer sailing due west, first sees the light when he is 5 km away from the light house and continues to see it for $30 \sqrt{2}$ minutes. What is the speed of the steamer?

A

10 k m p h

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

10 \sqrt{3} k m p h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

20 k m p h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

20 \sqrt{3} k m p h

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $10 k m p h$
The correct answer is option (a). Check the video for the approach.

Suggest Corrections

thumbs-up

3

Similar questions

Q. To a man walking at 7 kmph due west, the wind appears to blow from the north-west but when he walks at 3kmph due west, the wind appears to blow from north. The magnitude and actual direction of wind are

Q. A river is flowing from west to east at a speed of 5 metres per minute. A man on the south bank of the river, capable of swimming at 10 metres per minute in still water, wants to swim across the river in the shortest time. He should swim in a direction.
(a) due north
(b) 30° east of north
(c) 30° north of west
(d) 60° east of north.

Q. A train is moving at a constant speed at an angle

θ

East of north. Observations of the train are made from a fixed point. It is due north at some instant. Ten minutes earlier it bearing was

α_{1}

west of north, whereas ten minutes afterwards its bearing is

α_{2}

east of north. Find

tan θ

4 k m

towards North on his bike from his house and reaches point

A

5 k m

towards East and reaches point

B

B

4 k m

in north direction to reach point

C .

C

5 k m

in the west direction to reach the mosque. In which direction is the mosque from the Kareem's house?

4 k m

towards North on his bike from his house and reaches point

A

5 k m

towards East and reaches point

B

B

4 k m

in north direction to reach point

C

C

5 k m

in the west direction to reach the mosque. How far is Kareem's house from the Mosque?

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Bulls Eye View of Geometry

QUANTITATIVE APTITUDE

Watch in App

explore_more_icon

Explore more

Other Quantitative Aptitude

Join BYJU'S Learning Program

CrossIcon