Question

a body moves East with velocity 20 km per hour and then due north with velocity 15 km per hour the resultant velocity

Answer 1

at first, velocity of the body along east=20km/h, i.e, 20î. Then it's moving along north with a velocity 15km/h=15j.

the resultant(R)=√(15²+20²) [as cos90°=0]

                          =25km/h

Answer 2

Answer:

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