CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A right angled triangle having its base and height equal to 24 cm and 7 cm respectively is rotated by 360⁰ along its base. Find the curved surface area of the resultant figure.


A
520 cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
550 cm2
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
450 cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
1460 cm2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 550 cm2

When a right angled triangle is rotated by 3600 along its base, it forms a cone.

By Pythagoras theorem, the slant height:
l2=h2+r2
l=242+72
l=25 cm

When triangle rotates around its base, radius will be 7 cm.

So, curved surface area
=πrl
=227×7 cm×25 cm
=550 cm2


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Surface Area of Solids
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon