a trader sold an article at 10% profit if he had sold it at 10% loss, it would yield RS 140 less than the previous selling price. find the cost price of the article.​

Element x decays radioactively with a half life of 8 minutes. if there are 450 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 37 grams?

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

If x-1 and x+3 are the factors of x3+10x2+ax+b find a and b