Question

74. A motor boat is racing towards north at
25 km/hr and the water current in that
region is 10 km/hr in the direction of 600
east of south. The approximate resultant
velocity of the boat is
(a) 31 km/hr
(b) 22 km/h
(c) 44 km/hr
(d) 28 km/hr​

Answer 1

Answer:

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Explanation:

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Answer 2

Answer:

Given,

velocity of the water current v

c

=10 km/s

velocity of the motorboat v

b

=25km/h

angle between north and south east is 120

o

Resultant velocity v

R

=

v

b

2

+v

c

2

+2v

b

v

c

cos120

∘

(25) 2+(10) 2 +2(25)(10)( 2−1,)=22km/h −1

The resultant velocity of the boat is 22km/h −1