Question

at 10 km/h. Find his average speed.
9. A train covers the first 160 km of a journey at 40 km/h, the next 180 km at 45 km/h, and
the last 200 km at 50 km/h. Find (i) the total time it takes to complete the journey and
(ii) the average speed of the train during the whole journey.​

Answer 1

180 is the answer of this question