It is known that the length of the wiper is 40 cm, and the central angle of the wiper swing is 135 degrees, then the arc length of the area that the wiper passes through is 40 cm______ Cm (π = 3.14)

It is known that the length of the wiper is 40 cm, and the central angle of the wiper swing is 135 degrees, then the arc length of the area that the wiper passes through is 40 cm______ Cm (π = 3.14)


2 × 3.14 × 40 × 135 / 360 = 94.2 (CM)



The diameter of a car's steering wheel is 40 cm, and its circumference is 40 cm______ .


14 × 40 = 125.6 (CM), answer: its circumference is 125.6 cm. So the answer is: 125.6 cm