Learning Task 4. Now that you know how to solve different types of problems involving circumference, it is time for you to answer these problems on your own. Use the 4-step plan. 1. A car tire has a radius of 20 cm. How far will it go in 120 turns? 2. How far does a wheel of 50-cm diameter travel if it makes 750 revolutions? 3. How much greater is the circumference of a circle with a radius of 10 m than a circle with a diameter of 10 m?
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Answer:
1.15,072cm
2.117,750
3. 62.8m,31.4m
Step-by-step explanation:
1.Radius=20cm
C=2x3.14xr
C=2x3.14x20cm
C=125.6cm
How far will it go in 120 turns?
125.6cm×120turns=15,072cm
2.Diameter=50cm
C=2x3.14xr
since the radius is half the diameter;
50÷2=25
C=2x3.14x25=157
How far the diameter travel if it makes 750 revolutions?
157x750=117,750cm
3.Radius=10m
C=2x3.14x10=62.8m
Diameter=10m
since the radius is half the diameter;
10÷2=5m
C=2x3.14x5=31.4m
-The circle with the radius of 10 meter is twice greater than the circle with diameter of 10m
=31.4x2=62.8m
4-5. Wall Rose is circular and has a diameter of 760 km. Levi wishes to travel
around it. How long is the distance that he will travel? If Levi wants to travel
for 2000 km around the wall, at least how many times does he need to travel
around it (Answer for this question should be a whole number)?