Published by:
CGP EDU Academic Team
Published on: August 12, 2026
If log 10 5 = a and log 10 3 = b then-
A
log 30 8 = 
B
log 40 15 = 
C
log 243 32 = 
D
All above
Text Solution
Verified by ExpertsThe correct answer is:
C
(a, b, c, d)
log 30 8 = 
But log 2 = 1 – log 5 = 3 (1 – a) /(b + 1)
Hence choice [A] is true.
log 40 15 = 
= 
= 
Hence choice [B] is true.
log 243 32 = 
= 
= 
Hence choice [C] is true.
Thus correct choice are , , and
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