Question
In a moving car, there are 6 and a half rotations of a wheel per second. How many right angles did the wheel rotate through in one second? [3 MARKS]
Answer:
:
Steps: 2 Marks
Answer: 1 Mark
Given that:
The wheel rotates 6 and a half times in one second.
We know that in one revolution there are 4 right angles.
∴ In 6 revolutions, the number of rightangles = 6×4 = 24
∴ In half revolution, the number of right angles = 12×4 = 2
The total number of right angles = 24 + 2 = 26.
The wheel went through 26 right angles.
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:
Steps: 2 Marks
Answer: 1 Mark
Given that:
The wheel rotates 6 and a half times in one second.
We know that in one revolution there are 4 right angles.
∴ In 6 revolutions, the number of rightangles = 6×4 = 24
∴ In half revolution, the number of right angles = 12×4 = 2
The total number of right angles = 24 + 2 = 26.
The wheel went through 26 right angles.
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