The wheel of an engine turns 350 times round its axle to cover a distance of 1.76 km. The diameter of the wheel is

• A. 3 cm
• B. 9 cm
• C. ?3 cm
• D. 3?3 cm

Answer: (C)

Distance covered in 1 round = (Total Distance) / (Total round)= (1.76 x 1000)/350= 176/35 m ? 2?r = (1.76 x 100) / 35 cm2? = Diameter = 17600 x 7/22 x 35 = 160 cm