For the following questions answer them individually
A right circular cylindrical tunnel of diameter 5 m and length 10 m is to be constructed from a sheet of iron. The area of sheet required will be:
If 42 persons consume 144 kg, of wheat in 15 days, then in how many days will 30 persons consume 48 kg of wheat ?
The measures of three angles of a quadrilateral are in the ratio 1 : 2 : 3 . If the sum of these three measures of the fourth angle, find the smallest angle
Dhiru can dig $$\frac{1}{a}$$ of a field in 20 hours. What fraction of the same field can Kaku dig in 20 hours if the two of them can dig the field in 60 hours, working together at their respective rates?
If h,C,V are respectively the height, the curved surface and the volume of a cone, then $$3\pi$$ $$Vh^{3}-C^{2}h^{2}+9V^{2}=$$ ?
Three numbers are such that their sum is 50, product is 3750 and the sum of their reciprocals is $$\frac{31}{150}$$. Find the sum of the squares of the three numbers.
A certain amount grows at an annual interest rate of 12%, compounded monthly. Which of the following equations can be solved to find the number of years, y, that it would take for the investment to increase by a factor of 64 ?Â
