A wheel makes 2000 revolutions in covering a distance of 88 km. Find the radius of the wheel. একটি চাকা 88 km দূরত্ব অতিক্রম করতে 2000 বার ঘোরে। চাকাটির ব্যাসার্ধ কত?

Total distance covered = 88 km = 88000 m
Number of revolutions = 2000

Distance covered in 1 revolution = Circumference of wheel
\( = \frac{88000}{2000} = 44 \text{ m} \)

Circumference of a circle:
\( 2\pi r = 44 \)

Using \( \pi = \frac{22}{7} \):
\( 2 \times \frac{22}{7} \times r = 44 \)
\( \frac{44}{7} \times r = 44 \)
\( r = 7 \text{ m} \)

Correct Answer: Option C (7 m)