Fig. 15.87, shows the cross-section of railway tunnel. The radius `O A` of the circular part is 2 m. If `/_A O B=90o` , calculate: (i) the height of the tunnel (ii) the perimeter of the cross-section (iii) the area of the cross-section.

The cross-section of a tunnel is a square of side 7 m surmounted by a semicircle. The tunnel is 80 m long Calculate : the surface area of the tunnel (excluding the floor) .

The cross-section of a tunnel is a square of side 7 m surmounted by a semicircle. The tunnel is 80 m long ,Calculate : its volume

The following figure shows the cross-section ABCD of a swimming pool which is a trapezium in shape. If the width DC, of the swimming pool is 6.4 m, depth (AD) at the shallow end is 80 cm and depth (BC) at the deepest end is 2.4 m, find its area of cross-section.

The cross-section of a railway tunnel is a square surmounted by a semi-circle as shown in the figure. The tunnel is 50 m long. Find the cost of plastering the internal surface of the tunnel (excluding the floor) at the rate of Rs 10 per m^(2).

Find the curved surface area and the total surface area of a right circular cyclinder whose height is 15 cm and the diameter of the cross- sections is 14 cm

A uniform current I is flowing in a long wire of radius R . If the current is uniformly distributed across the cross-sectional area of the wire, then

If cross- sectional area of limb I is A_(1) and that of limb II is A_(2) then velocity of the liquid in the tube will be, (cross- sectional area of tube is very small)

The cross-section of a railway tunnel is a rectangle 6 m broad and 8 m high surmounted by a semi-circle . The tunnel is 35 m long. Find the cost of plastering the internal surface of the tunnel (excluding the floor) at the rate of Rs 2.25 per m^(2)

I-V characterstic of a copper wire of length L and area fo cross-section A is shown in Fig. The slope of the curve becomes

The pressure exerted on the smaller and the larger piston of a hydraulic machine is 15 Pa Calculate the force exerted by it on the larger piston, if the area of cross section of the larger piston is 4 m^2 .