"A DIAMETER OF THE WHEEL OF A CAR IS 84 CM AND THE SPEED OF A CAR IS 72KM/H. THE NO. OF REVOLUTIONS MADE BY THE WHEEL IN 11 MINUTES IS."IS THIS QUESTION EXAMPLE OF CIRCLE OR CYLINDER?

1 answer

The question is an example of uniform circular motion -> circle.

kph to mpm (meters per minute): 72kph -> 1200 m/min

cm to m: 84 cm -> 0.84m

circumference of the wheel = pi. diameter = 3.14 * 0.84m = 2.6376m

length of 1 revolution = circumference = 2.6376m

in 11 min: number of revolutions = 1200/2.6376 = 454.959m/min