Question

If the resultant of two vectors having magnitude of 7 and 4 is 3, the magnitude ou
two vectors could be:
ing magnitude of 7 and 4 is 3, the magnitude of the cross product of the
1) 28
2)3
3)11
4)0
Two buses starts from a bus stand with velocities 10 km/h and 30 km/h along two tracks inclined at 60
Find the distance between them after 12 minutes
1) 2 km
2) 5km
3) 7km
4) 2 root7 km
​

Answer 1

distance covered by First bus was (speed×time) =10×12=120/60=2km

(division by 60 to calculate distance in km)

Distance covered by second bus was 30×12=360/60=6km

Therefore, difference 4km is the distance between them.