Convex mirrors are used as reflectors in sodium reflector lamps because they are able to spread the light over a wide area. The neon gas lights at a lower temperature. As the temperature increases the sodium begins to vaporize and the lamp turns to a pure yellow. Argon has a lower glow voltage, argon helps the smaller lamps start at a lower voltage. The larger LPS lamps used in street lighting for the most part do not use argon.
Which of the following numbers is a divisor of (4915 – 1)?
A cuboidal box has dimensions of length = 18 cm, breadth = 15 cm, and height = 10 cm. If the breadth of the box is increased by 20% and its height is r...
A square whose diagonal is 12 √2 cm is made base of the pyramid. if height of the pyramid is 18cm, then what is the total surface area of the pyramid....
The volume of water measured on a rectangular field 400m 200m is 8000 . Find the depth (amount) of rain that has fallen.
A hollow spherical metallic ball has an external diameter 12cm and is 3/2cm thick. Find the surface area of the ball (in cm2) is.
Calculate the surface area of a sphere, given that its volume is (792/7) cm3.
If the diameter of a sphere is 63 cm, then what is the total surface area of the sphere?
If √̅1̅2̅-̅2̅√̅3̅5̅ + √̅8̅+̅2̅√̅1̅5̅ = √a + √b, where a and b are positive integers, then the value o...
A conical tent of height 5m and base diameter 24m was erected by a company in a park. Find the curved surface area of the tent (in m²).
A can do a certain work in 12 days, B alone can do the same work in 16 days. A and B undertook to complete it in Rs. 8000. With the help of C, they comp...
