Question

the diameter of a wheel of car is 1.4m. find the distance covered by the car in marking 200 revolutions by its wheels.​

Answer 1

Answer:

Your answer

Step-by-step explanation:

diameter = 49cm;

radius = diameter/2 = 24.5cm;

circumference = 2πr ≈ 153.94 = 154cm

1 revolution = 154cm

50 revolution = 7700cm = 77m

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Answer 2

Answer:

1540000cm^2.

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(use 22÷7/3.14)as given.

Step-by-step explanation:

Given:

i)Diameter:-1.4m radius=0.7m (1.4÷2)

1m=100cm

1.4m=1.4×100=140cm

0.7m=0.7×100=70cm

formulae of area of the wheel of the car:-

2pi r^2

2×22÷7×70÷2×70÷2

11×10×70

=7700cm2

In one revolution it will cover 7700cm2.

In 200 revolution it will cover=7700cm2×200

=1540000cm2

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