The diameter of the wheel of a car is 120m. How many revolution/min mustthe wheel makeing order to keep a speed of 60 km/hour approximately?  Choose one
A) 140 B) 160 C) 220 D) 250 E) 265

Rationale: "distance to be covered in 1 min . = ( 60 x 1000 ) / ( 60 ) m = 1000 m . circumference of the wheel = ( 2 x ( 22 / 7 ) x 0.60 ) m = 3.77 m . number of revolutions per min . = ( 1000 / 3.77 ) = 265 e"
Answer: E