Question

A man sold a watch at a loss of 10%.if he had taken rs 70 more there would have been a gain of 4%.find cp of the watch

Answer 1

if SP is 90%(100-10) and if SP is 104%(100+4) difference is 70Rupees

So 104%-90%=70 Rupees
So 1%=5 Rupees
100%(Cost Price)= 500 Rupees!