Processing math: 100%


1)

Two ships leave  a port from a point at the same time. one goes with a velocity of 3km/h along North-east  making an angle of 450 with east direction and the other travels with a velocity of 4km/h along South-East making an angle of 150 with East direction . Then, the distance  between  the ships  at the end of two hours is 


A) 213

B) 13

C) 5

D) 10

Answer:

Option A

Explanation:

Distance travelled by ship OA direction in 2h is 6km and OB  direction in 2h 138 km

 AB2=OA2+OB22OAOBcosAOB

 AB2=(6)2+(8)22×6×8cos600

 AB2=36+642×6×8×12

482021886_m7.PNG

 AB2=10048

 AB=10048=52

AB= 213