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​Q3. The cross- section of a tunnel perpendicular to its length is a trapezium ABCD as shown in the following figure ; also given that :

    AM = BN; AB = 7 m ; CD = 5 m. The height of the tunnel is 2.4 m. The tunnel is 40 m long. Calculate :

       (i) the cost of painting the internal surface of the tunnel (excluding the floor) at the rate of Rs. 5 per m2 (sq. metre).

       (ii) the cost of paving the floor at the rate of Rs. 18 prt m2.
                
                            
Q4. Water is discharged from pipe of  cross- section area 3.2 cm2 at the speed of 5 m/s. Calculate the volume of water discharged :

      (i) in cm3 per sec.

      (ii) in litres per minute.

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Sorry can't help exams are going
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Water is discharged from a pipe of cross- section area 3.2 cm at the speed of 5m/s. 一 Calculate the volume of water discharged (1) in cm" per sec. (ii) in litres per minute.

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