Question

C
13. Ifa: bc = 2.3.4 and 2a – 3b + 4c = 33 then
c = ?
(a) 10
(b) 7
(c) 12
(d) 8
​

Answer 1

Step-by-step explanation:

If a : b : c = 2 : 3 : 4 and 2a – 3b + 4c = 33, then the value of c is :

[A]6

[B]9

[C]12

[D]\frac{66}{7}

\mathbf{12}

a : b : c = 2 : 3 : 4

\therefore \frac{a}{2} = \frac{b}{3} = \frac{c}{4} = k (let)

=> a = 2k, b = 3k, c = 4k

Given, 2a - 3b + 4c = 33

=> 2\times 2k - 3\times 3k + 4\times 4k = 33

=> 4k - 9k + 16k = 33

=> 11k = 33

=> k = \frac{33}{11} = 3

\therefore c = 4k = 4\times 3 = 12

Hence option [C] is correct answer

Answer 2

Answer:

(c) 12 is right answer

Match your answer

I hope help you