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21. ROLLER COASTERS The latest thrill ride at a popular theme park takes
roller coaster fans on an exciting ride. In the first 20 seconds, it carries its
passengers up a 100-meter hill, plunges them down 72 meters, and
quickly takes them back up a 48-meter rise. How much higher or lower
from the start of the ride are they after these 20 seconds?

Respuesta :

Answer:

Step-by-step explanation:

Given

Roller coaster of theme park first take passenger 100 m high and plunges them down to 72 m quickly.  

therefore net rise is 28 m

It again Quickly  rises to 48 m to give a total elevation of 76 m from beginning

Thus a total of 100-72+48=76 m rise is given to roller coaster during entire 20 sec.

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