The Wheel of a Cart is Making 5 Revolutions per Second. If the Diameter of the Wheel is 84 Cm, Find Its Speed in Km per Hour. - Mathematics

Sum

The wheel of a cart is making 5 revolutions per second. If the diameter of the wheel is 84 cm, find its speed in km per hour.

Solution

Distance covered in 1 revolution = π × d

=(22/7xx84)"cm"

= 264 cm

Distance covered in 1 second =(5 × 264)= π × d

= 1320

Distance covered in 1 second = (60 × 60 × 1320)  cm

= 4752000 cm

=(4752000/(1000xx100)) "km"

= 47.52 km.

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APPEARS IN

RS Aggarwal Secondary School Class 10 Maths
Chapter 18 Area of Circle, Sector and Segment
Formative Assessment | Q 12 | Page 853