Maharashtra State BoardSSC (English Medium) 7th Standard

The wheel of a bullock cart has a diameter of 1.4 m. How many rotations will the wheel complete as the cart travels 1.1 km? - Mathematics

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Sum

The wheel of a bullock cart has a diameter of 1.4 m. How many rotations will the wheel complete as the cart travels 1.1 km?

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Solution

Diameter of the wheel, d = 1.4 m
Circumference, c = πd
= `22/7xx1.4`

= 22 × 0.2

= 4.4 m
Distance covered in 1 rotation =

circumference of the wheel = 4.4m
∴ Total number of rotations taken by wheel = `"total distance"/"circumference"`

= `(1.1 xx 1000)/4.4`

= `(11 xx 1000)/44`

= `11000/44`

= 250
Hence, the wheel of the bullock cart will complete 250 rotations as the cart travels 1.1 km.

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Chapter 11: Circle - Practice Set 42 [Page 77]

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Balbharati Mathematics 7th Standard Maharashtra State Board
Chapter 11 Circle
Practice Set 42 | Q 4 | Page 77

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