Question

The wheels of a car are of diameter 80cm each. how many complete revolution does each wheel make it in 10 minutes when the car is traveling at a speed of 66 km/hr

Answer 1

Answer:

sir NCERT chapter 12 ex 1 ka question 6 hai yeh

Answer 2

Answer:

4375 revolutions

Step-by-step explanation:

daimeter of wheel=80cm

radius of wheel=80/2= 40cm

circumfierence of wheel=2πr

= 2×22/7×40=1760/7

speed of car =66km/hour=66×100000/60=110000

distance travelled in 1o minutes=10×110000=1100000

let the car makes N revolutions in 10 minutes.

therefore

n×1760/7=1100000

n×1760=1100000×7

n=7700000/1760

n=192500/44

n=4375

so the car makes 4375 revolutions in 10 minutes.