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Q. The quantity y varies directly as xn . For x = 3, 4, 5 and 6, the corresponding values of y are 40.5, 96, 187.5 and 324. Find n:?
Option
A) 2
B) 2.5
C) 3
D) 3.5
Read Solution (Total 8)
-
- 10.5 13.5 16.5
DIFF= 3
Ans=3. - 10 years agoHelpfull: Yes(5) No(0)
- Xn = Y
3n = 40.5
n= 13.5
4n = 96
n = 24
5n = 187.5
n=37.5
6n=324
n=54
for first 2 value of n = 24 - 13.5 == 10.5
for next 2 difference = 37.5 - 24 == 13.5
for next 2 difference = 54 - 37.5 == 16.5
The value difference between each is 3.
so the value of n = 3 - 9 years agoHelpfull: Yes(4) No(0)
- shalu singh pls explain how to solve it
- 10 years agoHelpfull: Yes(3) No(2)
- ans:b 2.5
its easy
- 10 years agoHelpfull: Yes(2) No(6)
- shalu please explain yrrr
- 10 years agoHelpfull: Yes(0) No(7)
- it should be x^n.... answer is 3 :P
- 10 years agoHelpfull: Yes(0) No(3)
- answer is 2 because in every step it increase 0.5
- 10 years agoHelpfull: Yes(0) No(2)
- please can anyone explain it neatly m not getting it :(
- 9 years agoHelpfull: Yes(0) No(0)
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