future A boat is sailing with constant speed towards a man sitting on a tree on the river bank . At some moment , the man measures the angle of depression of the boat as 30degree .10 minuts later ,this angle is 60degree .how much longer will the boat now take to reach the bank ??
Answers
Answered by
7
There is you anwer, sorry for messy diagram.
I hope you get it
point A is starting point
B is position after 10 minutes
C is the bank(or foot of tree)
x is distance A to C (whole distance)
y is distance B to C
h is height of tree
rest is basic trig
If after calculating x-y, that is distance covered in 10 minutes, you got confused, all I noticed was the distance from A to B was double of B to C. So it will take half the time (5 minutes).
Now if that confused you, you can always calculate the speed s=d/t and use this to calculate time taken to get from B to C.
I assure you, it will be the same.
Regards.
I hope you get it
point A is starting point
B is position after 10 minutes
C is the bank(or foot of tree)
x is distance A to C (whole distance)
y is distance B to C
h is height of tree
rest is basic trig
If after calculating x-y, that is distance covered in 10 minutes, you got confused, all I noticed was the distance from A to B was double of B to C. So it will take half the time (5 minutes).
Now if that confused you, you can always calculate the speed s=d/t and use this to calculate time taken to get from B to C.
I assure you, it will be the same.
Regards.
Attachments:
karankoli:
thnx
No prob
very intelligent bro
thank you, but it comes with practice. I am sure you will learn too!
ok
Similar questions