The length of the largest rod that can be kept in a room of length 5 m, breadth 4 m and height 3 m is :

1. $3\sqrt{2}\text{ m}$

2. $5\sqrt{2}\text{ m}$

3. $7\sqrt{2}\text{ m}$

4. $\sqrt{2}\text{ m}$

The sum of the length, breadth and height of a cuboid is 24 cm, and the length of its diagonal is 15 cm. The area of its total surface is :

1. 348 cm²

2. 349 cm²

3. 350 cm²

4. 351 cm²

The area of cross-section of a hosepipe is 3 cm². Water flows through it at a speed of 50 cm/sec. How many litres of water flows out of it in one minute?

1. 7 litres

2. 8 litres

3. 9 litres

4. 11 litres

The sum of the length, breadth and height of a cuboid is 41 cm. If the length of its diagonal is 25 cm, then its total surface area is :

1. 1050 cm²

2. 1052 cm²

3. 1054 cm²

4. 1056 cm²