Question

6. The diameter of the wheel of a car is 70 cm. How many revolutio
1.65 km?​

Answer 1

Answer:

Heyy mate here is your answer

Step-by-step explanation:

Diameter =70 cm

Radius = Diameter/2

Radius = 70/2

=35

Circumference of wheel = 2πr

= 2×22/7×35

= 220 cm

1.65 km in cm

1.65× 1000×100

165000 cm

1 revolution = 220 cm

No. of revolution = 165000/220

No. of revolution = 750

Answer --- 750

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Answer 2

Solution

Given :-

• Diameter of wheel of a car = 70 cm

Find :-

• Number of revolution of 1.65 km

Step - by - Step - Explanation

Using Formula,

$\small{\boxed{\boxed{\tt{\red{\:circumference_{circle}\:=\:2\pi\:r}}}}}$

Here,

• Diameter of wheel (d) = 70

So,

• Radius of wheel (r) = 70/2 = 35 cm

Now, Calculate circumference of circle ,

➡ circumference of circle = 2 × 22/7 × 35

➡ circumference of circle = 2 × 22 × 5

➡ circumference of circle = 220 cm

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We Know,

✏ 100 cm = 1 meter

So,

✏ 220 cm = 2.2 meter

______________________

Again,

✏ 1000 meter = 1 km

So,

✏ 1.65 km = 1650 meter.

________________________

Since,

➡ circumference of circle = 2.2 m

That means, If wheel take one revolution he cover 2.2 m distance.

Now, Calculate total revolution take by car

∵ 2.2 m distance cover by wheel in 1 revolution.

•°• 1650 m distance cover by wheel take revolution will be = 1650/2.2 = 750

Hence

• Car take 750 revolution for covered 1.65 km distance .

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