The Speed of the Car is 66 Km/Hour. If Each Wheel of the Car is 140 Cm in Diameter, Find the Number of Revolutions Made by Each Wheel Perm Inute - Mathematics

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Sum

The speed of the car is 66 km/hour. If each wheel of the car is 140 cm in diameter, find the number of revolutions made by each wheel per minute.

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Solution

Circumference = 2 π r = π d 

`= 22/7 xx 140`

= 440 cm = 4.4 m

Circumference= 4.4 m 

Distance travelled in one hour= 66k m = 66000 m 

Distance travelled in one minute = `66000/60 = 1100 "m"`

No. of revolutions in one minute= `"Distance"/"Circumference"`

= `1100/4.4`

= 250

No. of revolutions made by each wheel = 250 rpm. 

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Chapter 19: Mensuration I - Exercise 19.1

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Frank ICSE Class 10 Mathematics Part 2
Chapter 19 Mensuration I
Exercise 19.1 | Q 29

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