In mirrors the back surface is coated with a thin layer of
In a spherical mirror, one of the twocurvedsurfacesiscoatedwithathinlayerof silver followed by a coating of red lead oxide paint. Thus, one side of the spherical minor is opaque and the other side is a highly polished reflecting surface.
10 lakh candidates write the TNPSC Exam this year. If each exam centre is allotted with 1000 candidates. How many exam centres would be needed?
Rs 450 is to be divided into three parts such that four times the first part may be equal to three times the second and six times the third. Then the sh...
The largest four digit number which when divided by 4, 7 and 13 leaves a remainder 3 in each case is
Find the greatest number which when divide 120,133 & 152 leave remainder 3, 7 & 8 respectively?
If Karkuzhali earns ₹ 1,800 in 15 days, then she earns ₹3,000 in ___________days.
The breadth of a rectangular field is 60% of its length. If the perimeter of the field is 800 m, what is the area of the field?
A can do a piece of work in 20 days and B can do it in 30 days. How long will they take to do the work together?
The curved surface area of a right circular cone of height 15 cm and base diameter 16 cm is
The value of a motor cycle 2 years ago was ₹ 70,000. It depreciates at the rate of 4% p.a. Find its present value.
A machine bought at Rs. 50,000 falls in its value by 8% of its value every year. Find the value of the machine after 2 years.
