Two sides of a parallelogram are in the ratio 4 : 3. If its perimeter is 56 cm, find the lengths of its sides.
The perimeter of a right triangle is 144 cm and its hypotenuse measures 65 cm. The other sides and its area are
If the height of a bucket in the shape of frustum of a cone is 16 cm and the diameters of its two circular ends are 40 cm and 16 cm then its slant height is
(a) 20 cm (b) 12√5 cm (c) 8√13 cm (d) 16 cm
In order to obtain a magnification of, - 0.75 with a convex lens of focal length 8 cm, the object should be placed : (a) at less than 8 cm (b) between 8 cm and 16 cm (c) beyond 16 cm (d) at 16 cm