Two cars start from the same place at the same time at right angles to each other. Their speeds are 54 km/hr and 72 km/hr, respectively. After 20 seconds the distance between them will be:
Answer & explanation
Correct answer: option 4
54 km/h = 54 × \(\frac{5 }{18}\)
= 15 m/sec
72 km/h = 72 × \(\frac{5 }{18}\)
= 20 m/sec
Distance covered by 1st car = 15 × 20 = 300 m
Distance covered by 2nd car = 20 × 20 = 400 m
Distance between two cars ,
H² = P² + B²
H² = 300² + 400²
H = 500 m