Two cars leave the same place at the same time. One runs at 20 km/hr towards north and the other at 15km/hr towards east. What will be the distance between them ( in km ) after 2
hours of travelling ?
(A) 70
(B) 10
(C) 25
(D) 50
please give step by step explanation.
Answers
Answered by
1
Answer:
Step-by-step explanation:
North and east are at 90 degree, equation becomes
(
2
x
2
)
+
[
2
(
x
+
5
)
]
2
=
50
2
on solving, we get
x
=
12.366
km/h
Answered by
1
Answer:
50 meters
Step-by-step explanation:
so speed of one car going north is 20 km/h
speed of the other car going east is 15 km/h
car₁ distance = 20 kilometers/hour ˣ 2 hours = 40 km
car₂ distance = 15km/h ˣ 2 h = 30 km
total distance is 30 + 40 = 70 km
total displacement = shortest distance covered
so the displacement is diagonal since its the shortest distance between 2 points
so by using Pythagoras Theorem
30² + 40² = displacement²
900 + 1600 = displacement²
2500= displacement²
displacement =
displacement = 50km
the actual distance is 50 kilometers
Similar questions