Question

if a man is standing 1246m away from the source then calculate the time taken to reach to the man from the source.

Please solve this question friends

Answer 1

Let x= distance of man from pole

Given

dt

dx

=1.1 m/s

ΔABC∼ΔPRC (By AA rule)

PR

AB

=

RC

BC

⇒

1.6

6

=

y

x+y

⇒6y=1.6x+1.6y

⇒4.4y=1.6x

⇒y=

11

4

x we have to find

dx

dy

∣

∣

∣

∣

∣

x=1m

∴

dt

dy

=

11

4

×

dt

dx

⇒

dt

dy

=

11

4

×1.1 m/s