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  1. The radius of a circular wheel is 1.75 m. The number of revolutions that it will make in travelling 11 km., is
    1. 1000
    2. 10,000
    3. 100
    4. 10
Correct Option: A

Using Rule 7,
Distance covered in 1 revolution = Circumference of wheel

= 2 ×
22
 × 1.75 m.
7

∴ Number of revolutions =
11 × 1000
2 ×
22
× 1.75
7

=
11 × 7 × 1000
 = 1000
2 × 22 × 1.75


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