Question
An airplane flew 7800 km from Country S to Country T at a speed of 780 km/h. It then covered 11050 km from Country T to Country U at a speed of 850 km/h. Find the time taken for the whole journey.
2 m

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An airplane flew 7800 km from Country S to Country T at a speed of 780 km/h. It then covered 11050 km from Country T to Country U at a speed of 850 km/h. Find the time taken for the whole journey.