the diameter of a car wheel is 84 cm find the number of revolution it makes to travel 66 kmThe diameter of a wheel of a car is 84 cm
Answers
Answered by
1
Step-by-step explanation:
Diameter of car wheel is 84 cm
Circumference of the wheel = 2*pi*r
= 2*22*.42/7
= 2.64 meter
Speed of the car is 72 kmph
Speed in m/sec is 72*5/18 = 20 m/sec
Distance covered in 11 minutes = 20*11*60 = 13200 meter
Number of revolutions in 11 minutes = distance covered in 11 minutes / circumference of the wheel
= 13200/2.64
= 5000 revolutions
Answered by
1
Answer: 42 m
Step-by-step explanation:
area of circle = πr^2
diameter=r/2 = 84/2 = 42
Area of the wheel =22/7×42×42
=5544m²
Revolutions will be covered in 132km = 5544÷132= 42m
Similar questions