RRB NTPC Prelims Model Paper 1 with solutions

Question : 28 of 100

Marks: +1, -0

A bullock cart wheel makes 5000 revolutions in moving 11 km. Then the radius of the wheel is : (Take π

= 22/ 7

)

Solution:

(3) Distance covered by the wheel of bullock cart in one revolution = Circumference of wheel = 2πr cm.
∴5000 × 2πr = 1100000 cm.

⇒ 2 ×22/7 × r =1100000/5000= 220

⇒r ={220 ×7}/{2 ×22} = 35 cm

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