Math Is Fun Forum

kcleigh2

Member

Registered: 2005-11-24

Posts: 13

algabra

please help me again lol.

the surface area,A,of a certain object of length,L, is given by the expression

                           A=    88Lsquared
                                 -----------------
                                      7

calculate the surface area of such an boject if it is 12.5cm long.   I HAVE DO THE ANSER SO THAT IT IS TO THE NEAREST WHOLE NUMBER.

FOR MY ANSWER IS HAVE GOT.

               A=  12.5L SQUARED
                    --------------------       =     23
                           7   

COULD SOMEONE PLEASE LET ME KNOW IF I HAVE GOT THIS RIGHT  PLEASE

THANKS

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i am really really really rubbish at maths lol lol lol lol lol lol lol lol lol lol lol lol

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 48,464

Re: algabra

A = 88L² /7
When L=12.5 cm,
A= (88*12.5*12.5)/7 = 1964.28571 cm² rounded off to
A=1964 cm²

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