Advertisement Remove all ads

The Radii of the Ends of a Bucket 16 Cm Height Are 20 Cm and 8 Cm. the Curved Surface Area of the Bucket is - Mathematics

MCQ

The radii of the ends of a bucket 16 cm height are 20 cm and 8 cm. The curved surface area of the bucket is

Options

  • 1760 cm2

  •  2240 cm2

  •  880 cm2

  •  3120 cm2

Advertisement Remove all ads

Solution

Radius of top of bucket r1 = 20 cm

Radius of bottom of bucket r2 = 8 cm

Height of bucket = 16 cm

The curved surface area of bucket  `= pi (r_1 +r_2) l`

`l = sqrt(h^2 + (r_1 +r_2)^2)`

`= sqrt(16^2 + (20 - 8)^2)`

`=sqrt(256 + 144)`

`l = sqrt400`

`l = 20 "cm"`

C.S.A. of bucket

` = pi (20 + 8) xx 20`

`= 22/7 xx 28 xx 20`

`=22 xx 80`

= \[1760 \ cm^2\]

  Is there an error in this question or solution?
Advertisement Remove all ads

APPEARS IN

RD Sharma Class 10 Maths
Chapter 14 Surface Areas and Volumes
Q 38 | Page 91
Advertisement Remove all ads

Video TutorialsVIEW ALL [1]

Advertisement Remove all ads
Share
Notifications

View all notifications


      Forgot password?
View in app×