A car travel 30km at a uniform speed of 40km/h and the next 30km at a uniform speed of 20km/h. Find average speed

26.67 km/h

Explanation:

A car travelling 30 km at 40 km/h will reach the destination in 0.75 hours.

Travelling 30 km at 20 km/h takes 1.5 hours.

So in this scenario, the car took 0.75 hours + 1.5 hours = 2.25 hours to travel a total of 60 km. The average speed would be 60/2.25 = 26.67 km/h.

not to sure sdi, strategic defense initiative

using the map image above, answer a, b, and c. a. briefly explain the historical context of this map image.b. briefly explain one economic or social development in the period 1607–1754 that could be used to explain what the cartographer (mapmaker) shows in the map image. c. briefly explain one social development in the period 1607–1754 that could be used to explain the distinctions shown in the map image.your responses: a.during this time period the colonies had recently been formed by the british. the colonies were grouped into three sections based on common beliefs, lively hood, and how they interacted. the new england colonies had passed the mayflower compact and they focused on trade, shipbuilding, and fishing. the middle colonies had purchased land from the native americans and dealt mostly with the export of wheat, banking, and shipping.

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