- #1

jiboom

- 91

- 0

1) show it reacges B in 500 seconds

2)if upon reaching B the motor boat immediately returns back to A in a straight line,again with speed 14,find the time taken for the return journey.

i need a diagram here to get started. book I am working through is no help :(

im thinking:

distance triangle: if C is point where motorboat meets B then have

AB=3

angle ABC=X say

velocity triangle:

Vb=velocity of B

Vm=velocity of motorboat

then

i have Vb pointing down, -vm at an angle up from bottom of vb and vb-vs makes other side

then angle between vb and vb-vs=180-x

but now not sure how to proceed so thinking my pictures are wrong or I am totally missing something. i seem to need another angle or length?