Hasan sold an article for 56 taka which cost him x taka . If he had gained x% on his outlay, what was his cost ?
40 taka
45 taka
36 taka
25
None of these
Description (বিবরণ) :
প্রশ্ন: Hasan sold an article for 56 taka which cost him x taka . If he had gained x% on his outlay, what was his cost ?
ব্যাখ্যা:
56 - x /x = x%
56 - x / x = x/100
5600 - 100x = x2
x2 + 100x - 5600 = 0
x2 + 140x - 40x - 5600 = 0
( x - 40) ( x + 140) = 0
x = 40
Related Question
Hasan sold an article for 56 taka which cost him x taka. If he had gained x% on his outlay , what was his cost ?
40 taka
45 taka
36 taka
25 taka
None of these
