The area of a square whose side is a diameter of a circle of area 4z^2 is
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Answer:
10th
Maths
Areas Related to Circles
Circumference and Area of Circle
The wheels of a car are of ...
MATHS
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
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VIDEO EXPLANATION
ANSWER
Given
Diameter of wheel (D)=80 cm
Radius (r)=
2
80
=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.=
60
66×1000
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 =
0.8π
11000
=
0.8×22
11000×7
=4375
Each wheel of the car makes 4375 complete
Answer:
4375
Step-by-step explanation:
Each car makes 4375