00:01
Given the body surface area, bsa, equal to square root of w times h over 3 ,600, where w is the weight in kilograms and h is height in centimeters, find the height, sorry, find the weight of a 177 centimeters male to the nearest kilogram whose bsa is 2 .1.
00:32
That is here we are given psa equal 2 .1 because psa will be a number.
00:46
Then we have height equal 177 centimeters.
01:02
And remember that height is given in centimeters.
01:16
That is we don't say one meter and 77 centimeters but we say 177 centimeters because we are given the measure of heights in centimeters so we have these two and we want w that is we want to solve this equation for w and that give us bsa equal square root to w h over 300 sorry 3 600 and from these we can say if we raise to the second power we say bsa square is equal to w h over 3 600 remember all the expression of the quantities here are positive w h and the constant 3600 and finally we solved for w w is then 300 3 ,600 times bsa square over but it's b better b s a square over h and so and this is the equation we're going to use and from there we go that weight is 3 ,600 times 2 .1, which is bsa square, over 177 centimeters.
03:42
So we get 3 ,600 times and 2 .1.
03:52
There, give us 4 .41 over 177.
04:10
And now using the calculator we find that this is equal to 899 -6 -9 -49.
04:37
And because we're going to give the result to the nearest kilogram, we drop the decimal part, take into account that the first decimal is 6, which is greater than 5...