Question

The diameter of a wheel of a car is 1.4m. How many revolutions will it take to cover a distance of 44km

Answer 1

Question :

★The diameter of a wheel of a car is 1.4m. How many revolutions will it take to cover a distance of 44km

Answer :

Given-

• Diameter= 1.4m; so, radius would be 0.7m

• Total distance = 44km = 44000m

Here,

The distance covered in one revolution = Circumference of the wheel

= 2πr

$= 2 \times \frac{22}{7} \times 0.7m$

Simplify

$= 2 \times 22 \times 0.1$

$= 4.4m$

Now , total distance= 44000m {given}

and , Distance covered in one revolution=4.4m {found above}

Here,

The total no. of revolution

$= \frac{total \: distance}{distance \: travelled \: in \: one \: revolution}$

$= \frac{44000}{4.4}$

after simplifying

$= 10000$

So, it would take 10,000 revolutions to complete the journey...

Answer 2

Answer:

Question :

★The diameter of a wheel of a car is 1.4m. How many revolutions will it take to cover a distance of 44km

Answer :

Given-

• Diameter= 1.4m; so, radius would be 0.7m

• Total distance = 44km = 44000m

Here,

The distance covered in one revolution = Circumference of the wheel

= 2πr

= 2 \times \frac{22}{7} \times 0.7m=2×

7

22

×0.7m

Simplify

= 2 \times 22 \times 0.1=2×22×0.1

= 4.4m=4.4m

Now , total distance= 44000m {given}

and , Distance covered in one revolution=4.4m {found above}

Here,

The total no. of revolution

= \frac{total \: distance}{distance \: travelled \: in \: one \: revolution}=

distancetravelledinonerevolution

totaldistance

= \frac{44000}{4.4}=

4.4

44000

after simplifying

= 10000=10000

So, it would take 10,000 revolutions to complete the journey...

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