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Simultaneous equations help? :S

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TSR's new app is coming! Sign up here to try it first >> 17-10-2016
    • Thread Starter

    Hi, I'm having trouble with this set of simultaneous equations for some reason and I just can't get the right answer

    ((I don't know where the pi symbol is so please take p as being pi)

    This was the original question:

    The diagram shows the net of a cylindrical container of radius r cm and height h cm. The full width of the metal sheet from which the container is made is 100cm, and the shaded area is waste. The s.a. of the container is 1400p cm^2.

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    i) write down a pair of simultaneous equations for r and h.
    ii) find the volume of the container, giving your answers in terms of pi.

    So for the simultaneous equations I got h+4r=100, and 2prh + 2pr^2 = 1400p

    But after I got these, whatever I've tried just isn't giving a reasonable answer.
    • Thread Starter

    Also, this is in the C1 section so I'm assuming I can't use a calculator
    • Thread Starter


    The answers in the back were obviously referring to the final volume whereas I was comparing the values I got for r and h

    I can try and help but I don't see the question for this problem...

    Posted from TSR Mobile
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