the mass of an aluminium rod varies directly with its length. if a 16 cm long rod has a mass of 192 .find the length of the rod whose mass is 105 g

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Solution

Hi,
according to the question,
m α l or m = kl
now
when l = 16 then m = 192
so 192 = 16k
k = 12
so
m = 12l
now
when m = 105g
then 105 = 12l
l = 105/12 =8.75 cm

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the mass of an aluminium rod varies directly with its length. if a 16 cm long rod has a mass of 192 .find the length of the rod whose mass is 105 g

Hi, according to the question, m α l or m = kl now when l = 16 then m = 192 so 192 = 16k k = 12 so m = 12l now when m = 105g then 105 = 12l l = 105/12 =8.75 cm

Hi,
according to the question,
m α l or m = kl
now
when l = 16 then m = 192
so 192 = 16k
k = 12
so
m = 12l
now
when m = 105g
then 105 = 12l
l = 105/12 =8.75 cm