A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise of `1/4` m and a tread of `1/2` m. (see Figure). Calculate the total volume of concrete required to build the ter

A small terrace at a football ground comprises of 15 steps each of which is 50 m long and built of solid concrete. Each step has a rise of 1/4 m and a tread of 1/2 m. Calculate the total volume of concrete required to build the terrace.

ABCDE is the end view of a factory shed which is 50m long. The roofing of the shed consists of asbestos sheets as shown in the figure. The two ends of the shed are completely closed by brick walls. Calculate the total volume content of the shed

The mass and density of a solid sphere are measured to be (12.4 +-0.1)kg and (4.6 +- 0.2) kg//m^3 . Calculate the volume of the sphere with error limits .

The mass and density of a solid sphere are measured to be (12.4 +-0.1)kg and (4.6 +- 0.2) kg//m^3 . Calculate the volume of the sphere with error limits .

The pillars of a temple are cylindrically shaped. If each pillar has a circular base of radius 20cm and height 10m. How much concrete mixture would be required to build 14 such pillars?

A rectangular tank is 25m long and 9.5m deep. If 600 cubic metres of water be drawn off the tank, the level of water in the tank goes down by 1.5m. Calculate : the total volume of water which the tank can hold

A boy of mass 50kg runs up a staricase of 45 steps in 9s. If the height of each step is 15cm, find his power. Take g = 10m//s^2

In an atom which has 2K, 8L, 8M and 2N electrons in the ground state, the total number of electrons having l=1 are

A long cylindrical tank of cross-sectional area 0.5m^(2) is filled with water. It has a small hole at a height 50cm from the bottom. A movable piston of cross-sectional area almost equal to 0.5m^(2) is fitted on the top of the tank such that it can slide in the tank freely. A load of 20 kg is applied on the top of the water by piston, as shown in the figure. Calculate the speed of the water jet with which it hits the surface when piston is 1m above the bottom. (Ignore the mass of the piston)

Young's moduli of two wires A and B are in the ratio 7:4 wire A is 2m long and has radius R. . wire B is 1.5 m long has radius 2mm for a given load , then the value of R is close to: