MATHS

1. The radius of the cylinder is half of its hight and area of the inner part is 616 sq.m, Approximately how many liters of milk can it contains?
 
        a. 1.4             b. 1.5
        c. 1.9             d. 1.7         e. 2.2


2.  2 meters broad pathway is to be constructed around a rectangular plot. the area of the plot is 96 sq.m . the cost of construction is rs.50 per sq.m. then find the total cost of production?

        a. 4800/-        b. 4000/-
        c. 2400/-        d. data inadquate       e. None


3. A sum of Rs.5000/- amounts to Rs.6050/- in 2 years. What is the rate of interest ?

         a. 15%           b.13%
         c. 11%           d. 21%         e. None


SOLUTIONS

1.     volume of Cylinder = 22/7*r*r*h
         here h= 2r
         then V= 22/7*r*r*2r
         Curve Surface area=  22/7*r*h              [here h= 2r ]
                                       = 22/7*r*2r
         Given that 22/7*r*2r= 616
                                        r= 7
          V= 2*22/7*r*r*r = 2*22/7*7*7*7
                                      = 2.156 liters = 2.2 liters   OPTION ( e )



 2.    data inadquate

 3.    A=P(1+R/100)^T
        6050=5000(1+R/100)^2
        6050/5000= (1+R/100)^2
        R/100= (11/10)-1
        R=1/10*100= 10%