18 km/hr and 72 km/hr respectively are equal to
Answers
Answer:
1m/s nd 20m/s
Explanation:
multiply km/hr quantity by 5/18 to convert in into m/s
Answer:
Speed of 1st car = 72 km/hr
speed of 2nd car = 54 km/hr
Formula Used:
x km/hr = x × (5/18) m/s
Distance = time × speed
Calculation:
F1 Vaibhav Madhu 07.04.21 D1
The speed of the 1st car = 72 km/hr = 72 × 5/18 = 20 m/s
⇒ The distance "AB" travelled by car in 20 seconds is = 20 × 20 = 400 m
The speed of the 2nd car = 54 km/hr = 54 × 5/18 = 15 m/s
⇒ The distance "BC" travelled by car in 20 seconds is = 15 × 20 = 300 m
Since two cars are moving at right angles to each other, so we will apply the Pythagoras theorem to find the distance between them.
The distance "AC" between them after 20 seconds is, √(AB2 + BC2)
⇒√(4002 + 3002)
⇒ √25000
⇒ 500 m
∴ After 20 seconds the distance between them will be 500 m.