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Question Number 68349 by peter frank last updated on 09/Sep/19

	Answered by mr W last updated on 09/Sep/19

	$w_{n e w} = 1.03 w (3 % m o r e = f a c t o r 1.03)$ $d_{n e w} = 0.975 d (2 . 5 % l e s s = f a c t o r 0.975)$ $t_{n e w} = 1.04 t (4 % m o r e = f a c t o r 1.04)$ $y = \frac{{K w d}^{4}}{t^{3}}$ $y_{n e w} = \frac{{K w}_{n e w} d_{n e w}^{4}}{t_{n e w}^{3}}$ $= \frac{K 1.03 w 0 . 975^{4} d^{4}}{1 . 04^{3} t^{3}} = 0.827 \frac{{K w d}^{4}}{t^{3}}$ $= 0.827 y = 82 . 7 % o f y$ $100 % - 82 . 7 % = 17 . 3 %$ $\Rightarrow y i s d e c r e a s e d b y 17 . 3 %$
	Commented by peter frank last updated on 09/Sep/19

	$p l e a s e s i r e l a b o r a t e$
	Commented by peter frank last updated on 21/Sep/19

	$t h a n k y o u$
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