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Q.

243 has been divided into three parts such that half of the first part, one - third of the second part and one - fourth of the third part are equal. The largest part is

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a

92

b

74

c

108

d

86

answer is D.

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Detailed Solution

We are given that 243 has been divided into three parts, say xx, yy, and zz. According to the problem:

  • Half of the first part: x2\frac{x}{2}
  • One-third of the second part: y3\frac{y}{3}
  • One-fourth of the third part: z4\frac{z}{4}

We are told that these three expressions are equal:

x2=y3=z4\frac{x}{2} = \frac{y}{3} = \frac{z}{4}

Let this common value be kk. Therefore:

x2=kx=2k\frac{x}{2} = k \quad \Rightarrow \quad x = 2k

y3=ky=3k\frac{y}{3} = k \quad \Rightarrow \quad y = 3k z4=kz=4k\frac{z}{4} = k \quad \Rightarrow \quad z = 4k

Now, the sum of the parts is given as 243:

x+y+z=243x + y + z = 243

Substituting the values of xx, yy, and zz in terms of kk:

2k+3k+4k=2432k + 3k + 4k = 243

Simplifying the equation:

9k=2439k = 243

Solving for kk:

k=2439=27k = \frac{243}{9} = 27

Now, we can find the values of xx, yy, and zz:

x=2k=2×27=54x = 2k = 2 \times 27 = 54

y=3k=3×27=81y = 3k = 3 \times 27 = 81 z=4k=4×27=108z = 4k = 4 \times 27 = 108

Thus, the largest part is z=108z = 108.

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243 has been divided into three parts such that half of the first part, one - third of the second part and one - fourth of the third part are equal. The largest part is