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darlenepitre
21.12.2020 •
Mathematics
The radius of the front wheel of Lisa's bike is 43cm. Lisa goes for a cycle and travels 56.75km. How many full revolutions did Lisa's front wheel complete?
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Ответ:
She completed 210 revolutions
Step-by-step explanation:
Firstly here, we will calculate the distance covered in a single revolution
Mathematically, that is the distance equivalent to the circumference of the circle
That will be ;
2 * pi * r
= 2 * 3.142 * 43 = 270.212 cm
So this is the length of one revolution
Now, we know that ;
1000 cm is 1 km
so x cm is 56.75 km
x = 56.75 * 1000 = 56750 cm
So the number of revolutions in 56750 cm distance will be ;
56750/270.212 = 210 revolutions
Ответ:
(B) Draw a graph that joins the points (100, 135) and (500, 375) and has a slope = 0.6
Step-by-step explanation:
1. They gave us two points
(100, 135)
(500, 375)
2. We find the formula
(375, 135)
(500,100) which is 0.6
~~Hope this helps~~