For the following questions answer them individually
A, B and C individually can complete a job in 20, 15 and 25 days respectively. If only one or two persons can be assigned the job who would complete the job quickly?
ABCD is a quadrilateral. AC = 12 cm. The perpendicular distances from B and D to AC are 4 cm and 6 cm respectively. Then the area (in $$cm^{2}$$) of the quadrilateral ABCD is
The circumference of circle A is $$\frac{11}{7}$$ times the perimeter of a square with area 784 sq. cm. The area of another circle B whose diameter is half the radius of the circle A, is (in sq. cm.)
A solid metallic sphere of radius 6 cm is melted and moulded into smaller spheres of diameter 4 cm. The number of smaller spheres made are
The radii of the bases of a cylinder and a cone are in the ratio of 3 : 4, and their heights are in the ratio 2 : 3. Then the ratio of their volumes is
The curved surface area of a cylinder is 1056 sq.cm, and its height is 28cm. The volume of the cylinder (in $$cm^{3}$$) is
The surface area of a cylindrical pipe, open at both the ends is 628 sq.cm. Its length is greater than its radius by 15 cm. If the pipe is closed at one end then the amount of water (in $$cm^{3}$$) the pipe can hold (taking $$\pi = 3.14$$) is
One diagonal of a rhombus is 20 cm and side of the rhombus is 26 cm. Then the area of the rhombus (in sq.cm) is