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

If the sum of three numbers in A.P. is 12 and sum of their cubes is 408, then sum of their squares is:


A

144

No worries! We‘ve got your back. Try BYJU‘S free classes today!
B

66

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C

36

No worries! We‘ve got your back. Try BYJU‘S free classes today!
D

None

No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B

66


a - d, a , a+4 are the terms

∴ a = 4, (4d)3 + 43 + (4+d)3 = 408 ⇒ d = ± 3

∴ sum of their squares = 1 + 16 + 49 = 66


flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Concept of Rotation
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon