Question

There are three persons A, B and C. A
invested 20% more than that of B and
C invested 40% more than that of B. If
the difference between the
investment of A and C is Rs 4000 than
find the investment of A?
A. 24000 B. 18000
C. 17500 D. 18600
E. 40000​

Answer 1

Answer:

i got the answer 12000 i think the option is wrong

Step-by-step explanation:

if b invest x then

$a = x + 20\%of \: x \\ a = 120 \div 100x \\ a = 6 \div 5x \\ c = 6 \div 5x + 40 \div 100x \\ c = 8 \div 5x \\ according \: to \: question \\ c - a = 4000 \\ 8 \div 5x - 6 \div 5x = 4000 \\ 2x \div 5 = 4000 \\ x = 10000 \\ since \: we \: know \: that \: \\ a = 6 \div 5x \\ we \: put \: the \: value \: of \: x \: and \: got \: the \: investment \: of \: a = 12000$

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