Question
Match the following inventions with it’s
Inventors. A. Microscope 1. D.G. Fahrenheit B. Thermometer 2. D. Hughes C. Barometer 3. Z. Jansen D. Microphone 4. E. TorricelliSolution
Microscope was invented by Z. Jansen in 1590 Thermometer was invented by Daniel Gabriel Fahrenheit in 1714 Barometer was invented by E. Torricelli in 1644 Microphone was invented by David Hughes in 1878
Find the approximate volume of a right circular cone having diameter 14 cm and height 3cm.(Take pie = 3.14.)
Angle bisectors of Q and R meet at point S, inside the triangle PQR. If angle QSR = 132˚ , then the measure of angle P is:
A circular pond is surrounded by a path 2 meters wide. The diameter of the pond is 28 meters. Find the cost of constructing the path at ₹140 per squar...
Axar purchased several cubical boxes at Rs. 12 each and placed them into a cuboidal box that perfectly fits these cubes. The curved surface area of the ...
The base of a triangle is 18 cm and height is 14 cm. The height of another triangle of double the area having the base 21 cm is:
The area of a square field is 4050 sq m. How long in seconds will a lady take to cross the field diagonally at the rate of 4.5 km/hr?
The sum of the perimeters of a square and a rectangle is 120 metres. If the sum of the length and breadth of the rectangle is 32 cm, then find the area ...
The ratio of the height of cylinder and cone is 14:27, and ratio of the radius is 6:7. The cylinder and cone are transformed into two cubes, respectivel...
In the figure given below, PQRS is a parallelogram in which PN and PM are perpendicular to QR and RS, respectively. If RS = 81 cm, PM = 42 cm and PN = 5...
The lateral surface area of a cube is 100 cm2 . The length of a cuboid is 40% more than the side of the cube. The breadth of the cuboid is 6...