Quantitative Aptitude Ques 214

Question: Find the number of revolutions, a wheel of diameter 40 cm can make in travelling a distance of 176 m. $ ( take\pi =\frac{22}{7} ) $

Options:

A) 140

B) 160

C) 168

D) 166

Show Answer

Answer:

Correct Answer: A

Solution:

  • Distance covered in 1 revolution = Circumference of wheel $ =2\pi r=2\times \frac{22}{7}\times 20,cm $ Total distance = 176 m = 17600 cm

$ \therefore $ Number of revolutions $ =\frac{17600}{2\times \frac{22}{7}\times 20} $ $ =\frac{17600\times 7}{2\times 22\times 20}=140 $

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