For the following questions answer them individually
A piece of work can be completed by A. B and C independently in 15 hours. 12 hours. and 10 hours respectively. A and B started the work. and after 4 hours C joined them and completed the work. The time (in minutes) C worked is
The radius (in feet) of the circle that circumscribes a rectangle whose length is 12 feet and has an area of 60 square feet, is
A wire in the formof a circle with a diameter 42 cms is bent to form a rectangle whose sides are in the ratio 6 : 5. The area (in sq.cms) of the triangle whose sides are the length. the breadth and the diagonal of the rectangle. is
The radius (in units) of the sphere whose surface area and volume are numerically equalis
A solid copper sphere of radius 3 cms is melted to make a wire of diameter 0.2 cms. The length of wire is
A door is in the shape of a rectangle of dimensions 10’ X 7', with a semicircle on its smaller side the circumference (in feet) of the door is (Take $$\pi = \frac{22}{7}$$)
If two cubes of sides 15 cms eachare joined together to form a cuboid then the surface area (in sq. cms) of the cuboid is