Mathematics, 13.12.2021 09:30 tricklts15

(1) A train covers a distance of 670 km in 6 h 5 min. If it covers the first 390 km of the journey at 90 km/h, find its speed for the rest of the journey.
(2) A bus covers 630 km in 9 h. If it completes the first two thirds of the journey at
60 km/h, calculate its speed for the rest of the journey.
Plz give step by step explanation
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(1) A train covers a distance of 670 km in 6 h 5 min. If it covers the first 390 km of the journey...