The sale price of an article including the sales tax is Tk. 616. The sales tax rate is 10%. If the shopkeeper has made a profit of 12%, then the cost of the article is-

If the compound interest of a certain sum of money for two successive years be Tk. 225 and Tk. 238.5, What is the rate of interest per annum?

8 taps through which water flows are the same rate can fill a tank in 30 minutes. If 2 taps go out of order, how long will the remaining taps take to fill the tank?

If A's income is 25% less than that of B, then what percent is b's income more than that of A?

How much will it cost to fence in a field that is 360 cm long and 160 cm wide with a fence that costs Taka 100 per meter?

If $\sqrt[3]{32}$ (cube root of 32) = $2^x$ , the value of x = ?

$(9{)}^3\times (81{)}^2÷\left(\right(27{)}^3)=(3{)}^x$, What is the value of x?