A bicycle wheel of radius 35cm is making 25 revolutions in 10secs. At what speed in km/hr is the cyclle moving
Answer pls......
Board exam 2mrw😰😰
see your earlier post:
http://www.jiskha.com/display.cgi?id=1458203016
To find the speed at which the bicycle is moving, we can use the formula:
Speed = Circumference * Number of revolutions * Time
First, let's calculate the circumference of the bicycle wheel. The circumference of a circle is given by the formula:
Circumference = 2 * π * radius
Given the radius of the bicycle wheel is 35 cm, we can substitute the value into the formula:
Circumference = 2 * 3.14 * 35 cm
Circumference ≈ 219.8 cm
Next, let's calculate the speed. We are given that it completes 25 revolutions in 10 seconds:
Speed = Circumference * Number of revolutions * Time
Speed = 219.8 cm * 25 * 10 seconds
Now, to convert the speed to km/hr, we need to convert the units from centimeters to kilometers and seconds to hours.
1 kilometer = 100,000 centimeters
1 hour = 3,600 seconds
Speed = (219.8 cm * 25 * 10 seconds) * (1 km / 100,000 cm) * (3600 seconds / 1 hour)
After performing the calculations, we get:
Speed ≈ 19.9 km/hr
Therefore, the bicycle is moving at a speed of approximately 19.9 km/hr.