Question

HOLA,



$\huge \fbox \red{❥ Question}$




The wheels of a car are of diameter 80 cm each. How many complete revolutions does each wheel make in 10 minutes when the car is travelling at a speed of 66 km per hour?​

Answer 1

Step-by-step explanation:

Given

Diameter of wheel (D)=80 cm

Radius (r)= 80/2

=40 cm.

1 complete revolution of wheel = Circumference of wheel (C)

C=2πr=2π×40=80π cm

C=0.8π m

Speed of the car =66 km / hr.= 66 × 1000/6 m/ min.

∴ Speed of the car =1100 m / min.

Therefore, in 10min., the car will travel a distance of 1100×10=11000 m

No. of revolutions of wheel = 11000 / 0.8π = 11000×7 / 0.8× 22 =4375

Each wheel of the car makes 4375 complete revolutions in 10 min.

hope it helps you

be happy always ✌️

sorry for late answer

Answer 2

Answer:

Here is your ans

Bohot mehnat se likha hai

I hope you are satisfied with my ans

thanks

Step-by-step explanation:

Given

Diameter of wheel (D)=80 cm

Radius (r)= 80/2 =40 cm.

1 complete revolution of wheel = Circumference

C=2πr=2π×40=80π cm

C=0.8π m

Speed of the car =66 km / hr.=

66×1000/60 m/ min.

∴ Speed of the car =1100 m / min.

Therefore, in 10min., the car will travel a distance of 1100×10=11000 m

No. of revolutions of wheel =

11000/0.8π

=11000×7/0.8×22

=4375

Each wheel of the car makes 4375 complete revolutions in 10 min.