A cricket ball rotates at 1800 rev/min as it travels through the space in a straight line at 160 km/hr. How many times does it revolve after traveling 20m?

Can someone confirm with me if 13.5 revolutions in 20m is right. That's the answer i got too. If it's wrong can someone please show me how to get to the answer?

d = V*t = 20 m = 0.02 km.

160 * t = 0.02.
t = 1.25*10^-4 hr. = 0.45 s. To travel 20
meters.

Rev = 1800rev/60s * 0.45s. = 13.5. Yes!!

Cheers man. Appreciate it.

Glad I could help.

To determine the number of revolutions the cricket ball makes after traveling 20m, we need to consider two important factors: its rotation speed and its linear speed.

First, let's convert the rotation speed from rev/min to rev/s by dividing it by 60 (since there are 60 seconds in a minute):
1800 rev/min ÷ 60 = 30 rev/s

Next, let's convert the linear speed from km/hr to m/s. To do this, we'll need to convert the distance (20m) to kilometers as well, since the given speed is in km/hr:
160 km/hr = 160,000 m/3600 s = 44.44 m/s

Now that we have both the rotation speed (30 rev/s) and the linear speed (44.44 m/s), we can find the number of revolutions made by the ball in a given distance using the formula:

Number of revolutions = (Linear distance traveled) / (Circumference of the rotating object)

The circumference of the rotating object can be determined using the formula:
Circumference = 2πR

Since the cricket ball's circumference depends on its radius, we need to find the radius of the ball. Unfortunately, this information is not provided in the question.

To calculate the number of revolutions accurately, we would need the radius or diameter of the cricket ball. Without that information, we cannot confirm whether the answer of 13.5 revolutions in 20m is correct or not.