The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:
Correct answer C. 44%
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Maths MCQs & Aptitude MCQs
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The ratio between the perimeter and the breadth of a rectangle is 5: 1. If the area of the rectangle is 216 sq. cm, what is the length of the rectangle?
Correct answer B. 18 cm
An error 2% in excess is made while measuring the side of a square. The percentage of error in the calculated area of the square is:
Correct answer D. 4.04%
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The ratio between the length and the breadth of a rectangular park is 3: 2. If a man cycling along the boundary of the park at the speed of 12 km/hr completes one round in 8 minutes, then the area of the park (in sq. m) is:
Correct answer B. 153600
What is the capacity of the cylindrical tank? The area of the base is 61,600 sq. cm. The height of the tank is 1.5 times the radius. III. The circumference of base is 880 cm.
Correct answer E. Only II and either I or III
What is the volume of a cube? I. The area of each face of the cube is 64 square metres. II. The length of one side of the cube is 8 metres.
Correct answer B. II alone sufficient while I alone not sufficient to answer
What is the height of a circular cone? I. The area of that cone is equal to the area of a rectangle whose length is 33 cm. II. The area of the base of that cone is 154 sq. cm.
Correct answer B. II alone sufficient while I alone not sufficient to answer
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.
Correct answer B. II alone sufficient while I alone not sufficient to answer
Is a given rectangular block, a cube? I. At least 2 faces of the rectangular block are squares. II. The volume of the block is 64.
Correct answer B. II alone sufficient while I alone not sufficient to answer
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What is the volume of 32 metre high cylindrical tank? I. The area of its base is 154 m2. II. The diameter of the base is 14 m.
Correct answer B. II alone sufficient while I alone not sufficient to answer
How many bricks, each measuring 25 cm x 11.25 cm x 6 cm, will be needed to build a wall of 8 m x 6 m x 22.5 cm?
Correct answer C. 6400
A large cube is formed from the material obtained by melting three smaller cubes of 3, 4 and 5 cm side. What is the ratio of the total surface areas of the smaller cubes and the large cube?
Correct answer C. 25 : 18
What is the total surface area of a right circular cone of height 14 cm and base radius 7 cm?
Correct answer C. 498.35 cm2
A cistern of capacity 8000 litres measures externally 3.3 m by 2.6 m by 1.1 m and its walls are 5 cm thick. The thickness of the bottom is:
Correct answer B. 1 dm
The curved surface area of a cylindrical pillar is 264 m2 and its volume is 924 m3. Find the ratio of its diameter to its height.
Correct answer B. 7 : 3
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A metallic sheet is of rectangular shape with dimensions 48 m x 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:
Correct answer B. 5120
A cistern 6m long and 4 m wide contains water up to a depth of 1 m 25 cm. The total area of the wet surface is:
Correct answer A. 49 m2
50 men took a dip in a water tank 40 m long and 20 m broad on a religious day. If the average displacement of water by a man is 4 m3, then the rise in the water level in the tank will be:
Correct answer B. 25 cm
A boat having a length 3 m and breadth 2 m is floating on a lake. The boat sinks by 1 cm when a man gets on it. The mass of the man is:
Correct answer B. 60 kg
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is:
Correct answer B. 3.696 kg