part c and d A sprinter set a high school record in track and field, running 200

Question

part c and d

A sprinter set a high school record in track and field, running 200.0 m in 20.9 s What is the average speed of the sprinter in kilometers per hour? Express your answer numerically in kilometers per hour. View Available Hint(s) Ay km/h Submit Part D A specific brand of gourmet chocolate candy contains 7.00 g of dietary fat in each 22.7-g piece. How many kilograms of dietary fat are in a box containing 3.00 lb of candy? Express your answer numerically in kilograms View Available Hint(s) Ay kg

Explanation / Answer

ans)

part C)

given distance=200 m = 0.2 km

time t=20.9 sec

20.9 s x 1 hr/3600 sec = 0.0058055 hr
we know that formula

speed=distance/time

speed = 0.2 km/0.0058055 hr = 34.45km/hr

part D)

First, you need to determine the mass in grams of the box of candy:
3.00lb x 453.59g/1 lb = 1360.77g

Second, you need to determine the number of pieces of candy in the box:

1360.77g/22.7g = 60.0 pieces of candy [ Approx. as 59.9458 = 60]

Third, figure out the total amount of dietary fat in grams:

60.0 pieces of candy x 7.00g = 420 g

There are 1000 grams in a Kg, so the answer is 0.42kg
So answer is : 0.42kg

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