Mathematics
In the following diagram a rectangular platform with a semicircular end on one side is 22 meters long from one end to the other end. If the length of the half circumference is 11 meters, find the cost of constructing the platform, 1.5 meters high at the rate of ₹ 4 per cubic meters.
Related Questions
A cylindrical water tank of diameter 2.8 m and height 4.2 m is being fed by a pipe of diameter 7 cm through which water flows at the rate of 4 m s-1. Calculate, in minutes, the time it takes to fill the tank.
The cross-section of a tunnel is a square of side 7 m surmounted by a semicircle as shown in the adjoining figure. The tunnel is 80 m long. Calculate:
(i) its volume,
(ii) the surface area of the tunnel (excluding the floor) and
(iii) its floor area.
Determine the ratio of the volume of a cube to that of a sphere which will exactly fit inside the cube.