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The diameter of a wheel is 70 cm. The number of revolutions to go 11 km is
A2500
B5000
C7500
D10000
Answer & Solution
Correct answer: B. 5000
1. Circumference = pi × d = (22/7) × 70 = 220 cm = 2.2 m.
2. Revolutions = 11000 / 2.2.
3. = 5000.
_Source: NCERT Class 10 Mathematics, Ch 11 "Areas Related to Circles", §11.2_
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