Question

HOW MANY TIMES WILL A WHEEL OF RADIUS 35CM BE ROTATED TO TRAVEL 660CM.(TAKE PIE=22÷7)

Answer 1

No of revolutions=Distance travelled/Perimeter of circle
Perimeter of circle=2πr
                             =2×22/7×35
                             =220 cm 
No of revolutions=660/220
                           =3 revolutions

Answer 2

radius of wheel =35 cm
circumference of wheel=2*22\7*35
=220cm

n*circumference of wheel=distance covered
n=660cm\220cm
n=3