Quantitative Skills Test...

'A' begins business with a capital of Rs. 800. After 4 months he takes in 'B' with a certain capital. 8 months after this, it is found that the total profits are twice as great as they would have been, if 'A' had continued alone. Assuming the profit rate constant. what did 'B' contribute?
1) 1500
2) 800
3) 1200
4) 1000

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  • CIVILPRINCESS
    CIVILPRINCESS

    @civilprincess-308hDv • Mar 21, 2011

    is the answer 1200?

    0
  • Tejashree Katdare
    Tejashree Katdare

    @tejashree-neQ3Bn • Mar 23, 2011

    How you solved it? Please explain.

    0
  • Chitti
    Chitti

    @chitti-HyCMj0 • Mar 23, 2011

    Let me explain it.
    Total amount invested by A in 12 months = Rs. (12*800) = 9600
    Let the amount invested by B be Rs. X
    so Total invested by B in 8 months = Rs. 8X
    A and B together invested Rs. (9600 + 8X)
    Ratio of profits = 2/1 = profits when both have invested/profits when only A had invested.
    2/1 = 9600+8X/9600
    19200 = 9600+8X
    9600 = 8X
    X = 1200

    0