A helicopter covers a distance in 4 hours at 280 km/h. To complete the same journey in 50 minutes, what speed is needed?

उत्तर दाखवा आणि स्पष्टीकरण

उत्तर: (A) 1344 km/h

स्पष्टीकरण

1120 km ÷ 5/6 h = 1,344 km/h.