A person covers the first 200 km at a speed of 50 km/h and the next 200 km at 70 km/h. Find its average speed in a journey of 400 km.A. 56.5 km/hB. 60.6 km/hC. 64.6 km/hD. 58.3 km/h

A person covers the first 200 km at a speed of 50 km/h and the next 20

1.	A person covers the first 200 km at a speed of 50 km/h and the next 200 km at 70 km/h. Find its average speed in a journey of 400 km.A. 56.5 km/hB. 60.6 km/hC. 64.6 km/hD. 58.3 km/h
A.	B
B.	C
C.	D
D.	A
Answer» D. A

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A person covers the first 200 km at a speed of 50 km/h and the next 200 km at 70 km/h. Find its average speed in a journey of 400 km.A. 56.5 km/hB. 60.6 km/hC. 64.6 km/hD. 58.3 km/h

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