It is: 4 to 3
20 cm x 15 cm = 300 cm2
If 15 cm is the diameter then circumference is pie x diameter which is 3.14 x15
The length is 20 cm.
Convert everything to the same unit; then you can easily compare. As a reminder, 1 cm = 10 mm.
The average speed of the ball can be calculated by dividing the total distance traveled by the total time taken. In this case, the average speed would be 25 cm/s (50 cm / 2 s = 25 cm/s).
The speed of the wave can be calculated using the formula speed = frequency x wavelength. Substituting the values given, the speed of the wave would be 15 cm/s.
The speed of the ball is ( \frac{120 \text{ cm}}{15 \text{ sec}} = 8 \text{ cm/sec} )
15
If you want the average speed, just divide the distance by the time.
Speed = (frequency) x (wavelength) = (5) x (3 cm) = 15 cm/sec
16 cm
The average swallow flies at at a cruising speed of 15 beats per second and an amplitude of 22 cm.
8.8 cm/yr
15 cm per second
14
The idea is to divide the distance by the time.