Question

plese answer my question.

A trader purchased a wall clock and watch for a sum of 5070. he sold them making a profit of 10% on the wall clock and 15% on the watch.He earns a profit of 669.50. find the cost price of the wall clock and that of the watch.

Answer 1

Let the cp of a wall clock be x rs.
thus the cp of a watch = (5070 - x)rs.
from question,
x×10%+(5070-x)=669.50
or , 10x/100+15/100 (5070-x)=669.50
therfore x=1820rs.
I. e. cp of a wall clock =1820 rs.
and cp of a watch =5070 -1820
=3250 rs.