Area Problems
The wheel of an engine turns 350 times round its axle to cover a distance of 1.76 km. The diameter of the wheel is

9 cm
3 cm
?3 cm
3?3 cm

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Area Problems
If the area of an equilateral triangle is x and its perimeter is y, then which one of the following is correct?

y2 = 432 x2
y4 = 216 x2
y4 = 432 x2
None of these

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