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 देखें और व्याख्या

उत्तर: (A) 1344 km/h

व्याख्या

1120 km ÷ 5/6 h = 1,344 km/h.