Question

Rahul sold a watch at a loss of 5% if he had sold that watch for rupees 27 more he would have been 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 cost price = rs225