Check sibling questions

Ex 13.2, 4 - The diameter of roller is 84 cm and its length - Area Of Cylinder

 

This video is only available for Teachoo black users

Introducing your new favourite teacher - Teachoo Black, at only ₹83 per month


Transcript

Ex 13.2, 4 The diameter of a roller is 84 cm and its length is 120 cm. It takes 500 complete revolutions to move once over to level a playground. Find the area of the playground in m2? [𝐴𝑠𝑠𝑢𝑚𝑒 𝜋= 22/7] Roller is of form cylinder Radius = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = 84/2 = 42 cm Area of roller = Curved surface of cylinder = 2πrh = (2×22/7×42×120) cm2 = 31680 cm2 Area of 1 revolution = Area of roller = 31680 cm2 Area of 500 revolution = 500 × 31680 cm2 Area of playground = 15840000 cm2 = 15840000 ×1/(100 ) ×1/(100 )m2 = 1584 m2

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.