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Question Number 218312 by Rojarani last updated on 06/Apr/25

	Answered by mr W last updated on 07/Apr/25

	$s a y t h e t i m e n e e d e d f r o m h o u s e t o$ $s t a t i o n A i s x, a n d f r o m h o u s e t o$ $s t a t i o n B i s y .$ $f o r u p t r a i n i t i s g i v e n :$ $x + 4 = y + 1 \Rightarrow y = x + 3$ $f o r d o w n t r a i n :$ $s a y i s h a l l s t a r t z m i n u t e s e a r l i e r$ $t o c a t c h t h e t r a i n a t B, t h e n$ $x + z = y + 4$ $x + z = x + 3 + 4$ $\Rightarrow z = 7 m i n u t e s$
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