At a jewelry store, the price p of a gold necklace varies directly with its length l. Also, the weight w of a necklace varies di
rectly with its length. Show that the price of a necklace varies directly with its weight.
1 answer:
Since p varies directly with l,
p = kl (1)
Also, since w varies directly with l,
w = ml
or, l = w/m
Substitute in (1), we get,
p = k (w/m)
= (k/m) w
So, the price varies directly with weight.
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