Question 29
The radii of circular ends of a bucket of height 24 cm are 15 cm and 5 cm. Find the area of its curved surface.
Last updated at Oct. 1, 2019 by Teachoo
Question 29
The radii of circular ends of a bucket of height 24 cm are 15 cm and 5 cm. Find the area of its curved surface.
Transcript
Question 29 The radii of circular ends of a bucket of height 24 cm are 15 cm and 5 cm. Find the area of its curved surface. Here, the bucket is in the shape of a frustum Where h = height = 16 cm r1 = radius of upper end = 20 cm r2 = radius of lower end = 8 cm We need to find its Curved Surface Area Curved Surface Area of frustum = ๐(๐1+๐2)๐ We need to find l We know that ๐ = โ(โ2+(๐1โ๐2)2) ๐ = โ(242+(15โ5)2) ๐ = โ(242+102) ๐ = โ(576+100) ๐ = โ676 ๐ = โ(ใ26ใ^2 ) ๐ = 26 cm Now, Curved surface area of frustum = ๐(๐1+๐2)๐ = ๐(15+5)ร26 = 22/7ร20ร26 = (440 ร 26)/7 = 11440/7 = 1634.28 cm2 โด Curved surface area of frustum = 1634.28 cm2
CBSE Class 10 Sample Paper for 2019 Boards
Question 1
Question 2 (Or 1st)
Question 2 (Or 2nd) Important
Question 3 (Or 1st) Important
Question 3 (Or 2nd)
Question 4
Question 5 Important
Question 6 Important
Question 7 (Or 1st)
Question 7 (Or 2nd) Important
Question 8 (Or 1st)
Question 8 (Or 2nd)
Question 9
Question 10 Important
Question 11 Important
Question 12 Important
Question 13 Important
Question 14
Question 15
Question 16 (Or 1st) Important
Question 16 (Or 2nd)
Question 17 (Or 1st) Important
Question 17 (Or 2nd)
Question 18 Important
Question 19 (Or 1st)
Question 19 (Or 2nd) Important
Question 20
Question 21 (Or 1st) Important
Question 21 (Or 2nd)
Question 22
Question 23 (Or 1st) Important
Question 23 (Or 2nd)
Question 24
Question 25
Question 26
Question 27 (Or 1st)
Question 27 (Or 2nd) Important
Question 28 (Or 1st)
Question 28 (Or 2nd) Important
Question 29 You are here
Question 30 Important
CBSE Class 10 Sample Paper for 2019 Boards
About the Author