Periyar University 2008 B.E Electronics

Therefore 137 matches should be played to determine the 2nd finalist from the remaining 138 players (excluding the first player)

Therefore to determine the winner 138 matches should be played.)




75) 1 RECTANGULAR PLATE WITH LENGTH 8INCHES, BREADTH 11 INCHES AND two INCHES THICKNESS IS THERE.WHAT IS THE LENGTH OF THE CIRCULAR ROD WITH DIAMETER eight INCHES AND EQUAL TO quantity OF RECTANGULAR PLATE?

Sol: Vol. of rect. plate= 8*11*2=176

Area of rod= (22/7)*(8/2)*(8/2) = (352/7)

Vol. of rod=area*length=vol. of plate

So length of rod= vol of plate/area=176/ (352/7) =3.5


Ans: 3.5


76) 1 tank will fill in six minutes at the rate of 3cu ft /min, length of tank is four ft and the width is 1/2 of length, what is the depth of the tank?

Ans: three ft 7.5 inches





77) A power unit is there by the bank of the river of 750 meters width. A cable is made from power unit to power a plant opposite to that of the river and 1500mts away from the power unit. The cost of the cable beneath water is Rs. 15/- per meter and cost of cable on the bank is Rs.12/- per meter. obtain the total of laying the cable.

Ans: 1000 (24725 - cost) 20250

Ans: Rs. 22,500 (hint: the plant is on the other side of the plant i.e. it is not on the identical side as the river)




78) The cost of 1 pencil, 2 pens and 4 erasers is Rs.22 while the cost of 5 pencils, 4 pens and 2 erasers is Rs.32.How much will 3 pencils, 3 pens and 3 erasers cost?

Sol :( let x b pencil, y b pen and z b eraser... u get x+2y+4z=22 and 5x+4y+2z=32 add 6x+6y+6z=54 div by two you get 27)
Ans: 27





79) A man has to get air-mail. He begins to go to airport on his motorbike. Plane comes early and the mail is sent by a horse-cart. The man meets the cart in the middle after half an hour. He takes the mail and returns back, by doing so, he saves twenty minutes. How early did the plane arrive?

Sol: presume he started at 1:00, so at 1:30 he met cart .He returned home at 2:00.so it took him one hour for the total journey. By doing this he saved 20 min. So the true time if the plane is not late is one hour and 20 min. So the true time of plane is at 1:40.The cart traveled a time of 10 min before it met him. So the plane is 10 min early.

Ans: 10 min

Earning:   Approval pending.