Question

Parvinder sold a watch at a loss of 5% .if he had sold that watch for rs.27more,he would have gained 7%. Find the cost price of the watch.

Answer 1

let the cost price= Rs x
1)
loss=l=5%
selling price(s1)=x(100-l%)/100
=x(100-5)/100
=95x/100-----(1)
2)
gain (g)=7%
selling price(s2)= x(100+g)/100
= x(100+7)/100
=107x/100-----(2)
but
(2) - (1)=27

107x/100 - 95x/100=27
12x/100=27
x=27*100/12
after cancellation
x=225
therefore
cost price=Rs225

Answer 2

Answer:

Step-by-step explanation:

Let the cost price be rs 100              if it is sold at a loss of 5%.               Then , s.p.=(100-5)= rs 95              if it is sold at a sold at a profit of 2%.  Then, s.p.= rs(100+7)=rs 107      increase in actual gain = rs(107_95)=rs 12.                              If gain is rs 12,then c.p.= rs100.           If gain is rs 1,then c.p.=rs 100/12        if gain is rs 27,then c.p.=(100/12×27)=rs 225.                        Hence , the c.p. of watch is rs 225.