Aptitude - Arithmetical Ability

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49.

The volume of a wall, 5 times as high as it is broad and 8 times as long as it is high, is 12.8 cu. metres. Find the breadth of the wall.                        
A. 50cm B. 60cm
C. 40cm D. 45cm



50.

Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the surface area of the cube so formed.                        
A. 486 cm^2 B. 956 cm^3
C. 952 cm^2 D. 955 cm^2



51.

Two cubes have their volumes in the ratio 1 : 27. Find the ratio of their surface areas.                        
A. 1:09 B. 2:04
C. 3:06 D. 4:09




52.

Water flows into a tank 200 m x 160 m througb a rectangular pipe of 1.5m x 1.25 m @ 20 kmph . In what time (in minutes) will the water rise by 2 metres?                        
A. 96mins B. 85mins
C. 96secs D. 88secs



53.

What is the capacity of a cylindrical tank?
I. Radius of the base is half of its height which is 28 metres.
II. Area of the base is 616 sq. metres and its height is 28 metres.                        
A. I alone sufficient while II alone not sufficient to answer B. II alone sufficient while I alone not sufficient to answer
C. Either I or II alone sufficient to answer D. Both I and II are not sufficient to answer



54.

What is the capacity of the cylindrical tank?
I. The area of the base is 61,600 sq. cm.
II. The height of the tank is 1.5 times the radius.
III. The circumference of base is 880 cm.                        
A. Only I and II B. Only II and III
C. Only I and III D. Only II and either I or III



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