Suppose a girl is standing on a pond where there is no friction between her feet and the ice. In order to get off the ice, she can get on her hands and knees and crawl off the ice.

bend over touching the ice in front of her and then bring her feet to her hands.

walk very slowly on tiptoe.

throw something in the direction opposite to the way she wants to go

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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pls mark as brainliest

mass and volume are the answers you are looking for

that tool is called an altimeter which measures your altitude which can be used to tell which atmosphere you are currently in, including the stratosphere.

hope this ! : )