1. A
120 litres

B
1200 litres

C
12000 litres

D
120000 litres

Explanation: Not available

2. A
56 kg

B
48 kg

C
36 kg

D
27 kg

Explanation: Volume = (9 xx 40/100 xx 20/100) cu.m = 18/25 cu.m. :. Wight = (18/25 xx 50) kg = 36 kg.

3. A
30 m

B
15√2 m

C
30√2 m

D
60 m

Explanation: Length of longest rod = Length of diagonal = √1^2 + b^2 + h^2 = √(30)^2 + (24)^2 + (18)^2 = √1800 = 30√2 m.

4. A
40000

B
20000

C
50000

D
45000

Explanation: Volume of wall = (2400 xx 800 xx 60) cu. cm. Volume of wall (apart from mortar) = (/100 xx 2400 xx 800 xx 60) cu.m. Volume of 1 bricks = (24 xx 12 xx 8) cu. cm. :. Number of bricks required = (90/10 xx 2400 xx 800 xx 60 xx 1/(24 xx 12 xx 8) = 45000.

5. A
6

B
11

C
33

D
40

Explanation: Volume of block = (6 xx 12 xx 15) cu. cm = 1080 cu. cm. The side of largest cube = H.C.F.of 6 cm, 12 cm, 15 cm = 3 cm. Volume of this cube = (3 xx 3 xx 3) cm^3 = 27 cm^3 Number of cubes = (1080/27) = 40.

6. A
12 m

B
16 m

C
32 m

D
20 m

Explanation: Suppose height = x metres . Then, breadth = 2x metres and length = 4x metres. :. x xx 2x xx 4x = 512 or x^3 = 64 or x = 4. :. Length = 4x = 16 m.