Question

Diameter of a wheel is 1.26 m.how rovolution it take in 500 round

Answer 1

radius of the wheel = 1.26 / 2 = 0.63.
distance covered in one revolution = circumference of the wheel =
$2\pi \: r$
thus = 2 x 22/7 x 0.63 = 3.96
now distance is 500 revolution
= 3.96 x 500 m
= 1980 m
= 1.98 km

Answer 2

D is 1.26m
r will be 0.63
Distance cover in one revolution is 2*22/7*0.63 equals
3.96m
Distance in 500 rev.
3.96*500 -- 198m