A lorry travels at 50km/h. Given that the diameter of its wheel is 88cm, find how many revolutions per minute the wheel is turning. Given your answer to the nearest whole number.
50 km = 5000000 cm .
5000000 / 60(88*3.142)
301 revolutions per minute :)
pta nhi yrr
To find the number of revolutions per minute (RPM) the wheel is turning, we can use the following formula:
RPM = (Speed × 1000) / (π × Diameter)
First, let's convert the diameter from centimeters to meters:
Diameter = 88cm = 0.88m
Next, we need to convert the speed from kilometers per hour (km/h) to meters per minute (m/min):
Speed = 50 km/h = (50 × 1000) m/60 min = 833.33 m/min
Now we can plug the values into the formula:
RPM = (833.33 × 1000) / (π × 0.88)
RPM = 949235.65 / 2.75
RPM ≈ 344977.96
Rounding the answer to the nearest whole number, the wheel is turning approximately 345,000 revolutions per minute.
But how to find it
C = pi*D = 3.14 * 0.88m = 2.76 m.=
Circumference.
Va=50000m/h * 1rev/2.76m=18,182 rev/min
88cm diameter
So,
44cm radius
Baki khud karo