The value of $$ {\sqrt{x^{2}y}\over{\sqrt{xy^{2}}}}×\sqrt{y\over{x}}$$ is

If a + b + c=15, abc=120 and (ab+bc+ca)=74, then the value of a³+b³+c³=?

If 0.5x + 0.7y=0.5 and 0.7x + 0.5y=0.7,then the value of x+y is

If $$ {(x-2)^{2}+(y-{1\over2})^{2}}=0$$, then the value of $$ {x\over y}$$ is

A person invested 1100 in a company at compound interest compounded semi-annually. He received 1331 after one year. The rate of interest per annum is 

A sells to B an iron box at 10% profit. B sells it to C for 20% profit. If C pays Rs. 528 then then the cost price of A is

The average age of four sisters is 7 years. If the age of the mother is include, the average is increased by 6 years. Then the age of the mother is

A rises from his house at 12 noon towards B’s house at a speed of 8 km/hour. After 1 hour, B rides from his house towards A’s at a speed of 7 km/hour. If the distance between the two houses is 68 km, the time when they meet is