vinnie48
10.09.2021 •
Mathematics
The ratio of the areas of two similar polygons is 25:9.
a) What is the ratio of their sides.?
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Ответ:
Ответ:
60 km/h
Step-by-step explanation:
The car has traveled a total distance of 65+80 = 145 km in 70+75 = 145 minutes. Then the average speed is ...
speed = distance/time = (145 km)/(145 min)·(60 min/h) = 60 km/h
The average speed for the journey is 60 km/h.