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

The ratio of present ages of Shankar and Mohan is 7: 8 respectively. Four year hence this ratio becomes 9: 10 respectively. What is Shankar’s present age in years?

In how many years will Rs 2000 become Rs 2420 at 10 percent compound annual interest?

Find the compound interest to the nearest rupee on Rs. 7500 for 2 years 4 months at 12% p.a reckoned annually?

The volume of a solid right circular cone is 600 π cm³, and the diameter of its base is 30 cm. The total surface area (in cm²) of the cone is:

Medha sells her bag for ₹ 300 and loses ₹ 60. At what price must she sell the article to gain 15%?

75% of a number is equal to three-seventh of another number. What is the ratio between the first number and the second number respectively?

A, B and three men can finish a work in 10, 20 and 15 days respectively, then in how many days will all three together finish the work?