1. A rectangular water tank is 80 m × 40 m. Water flows into it through a pipe 40 sq. cm at the opening at a speed of 10 km/hr. By how much, the water level will rise in the tank in half an hour?
(a) 4/11 cm
(b) 5/9 cm
(c) 5/8 cm
(d) 4/5 cm

2. A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of areas of the four walls, the volume of the hall is:
(a) 720
(b) 800
(c) 1200
(d) 2000

3. The sum of the length, breadth and depth of a cuboid is 19 cm and its diagonal is cm. It surface area is:
(a) 127 cm²
(b) 236 cm²
(c) 361 cm²
(d) 480 cm² 

4. A swimming pool 9 m wide and 12 m long is 1 m deep on the shallow side and 4 m deep on the deeper side. Its volume is:
(a) 309 m³
(b) 270 m³
(c) 360 m³
(d) 607 m³

5. A metallic sheet is of rectangular shape with dimensions 48 m × 36 m. From each of its corners, a square is cut off so as to make an open box. If the length of the square is 8 m, the volume of the box (in m³) is:
(a) 5835
(b) 6400
(c) 6420
(d) 9260

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