Question

$52$ packets of $12$ pencils each, cost Rs. $499.20$. Find the cost of $65$ packets of $10$ pencils each.

Answer 1

$52$ packets of $12$ pencils will contain $=52\times 12=624$ pencils

And $65$ packets of $10$ pencils will contain $=65\times 10=650$ pencils

Now,

$624$ pencils costs $=Rs.499.20$

$1$ pencil will cost $=Rs.\frac{499.20}{624}$

$650$ pencil will cost $=Rs.\frac{499.20}{624}\times 650$

$=Rs.520$

Hence, $65$ packets of $10$ pencils each costs $Rs.520$