Question
Download Solution PDFThe wheel of a lorry has radius 182 cm. The number of revolutions (approximately) per minute the lorry wheel will make is _______ (if the speed of the lorry is 66 km/h).
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept used:
Circumference of a circle = 2 × π × r
Calculation:
The circumference of of the wheel = 2 × 22/7 × 182 = 1144 cm
Here, the lorry can go 66 km in 60 min, then the lorry can cover in 1 min is = 66/60 = 1.1 km = 110000 cm
Now the wheel of the lorry makes the number of revolutions per min is 110000/1144 = 96.15 ~ 96
∴ The correct answer is 96
Last updated on Jul 2, 2025
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