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If 4,\ a ,\ a ,\ 36 are in proportion, t...

If `4,\ a ,\ a ,\ 36` are in proportion, then `a=`
(a) 24
(b) 12
(c) 3
(d) 24

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RD SHARMA ENGLISH-RATIO, PROPORTION AND UNITARY METHOD-All Questions
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  3. If 4,\ a ,\ a ,\ 36 are in proportion, then a= (a) 24 (b) 12 (c)...

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  4. If 5:4 :: 30 : x , then the value of x is (a) 24 (b) 12 (c) 3/2...

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  10. If a, b, c are in continued proportion, then which of the following to...

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  11. If a=2b ,\ then a : b= (a) 2:1 (b) 1:2 (c) 3:4 (d) 4:3

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  12. If 4:3=x^2: 12 , then the value of x\ (x >0)dot (a) 16 (b) 4 (c)...

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  13. If x : y=2:3 and y : z=2:3, then x : z= (a) 2:3 (b) 3:4 (c) 5:...

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  14. If 80 : 60=x : 12 , then x= (a) 16 (b) 7 (c) 24 (d) 50

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  16. If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)= (a) 7/(11) (b) (17)/(11) ...

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