If each edge of a cube is increased by 50%, find the percentage increase in Its surface area

A) 125% | B) 150% |

C) 175% | D) 110% |

Explanation:

Let the edge = a cm

So increase by 50 % = =

Total surface Area of original cube =

TSA of new cube =

==

Increase in area = =

Increase % = = 125%

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Subject: Volume and Surface Areas - Quantitative Aptitude - Arithmetic Ability

A rectangular block 6 cm by 12 cm by 15 cm is cut up into an exact number of equal cubes. Find the least possible number of cubes.

A) 30 | B) 40 |

C) 10 | D) 20 |

Explanation:

Volume of the block = (6 x 12 x 15) = 1080

Side of the largest cube = H.C.F. of 6 cm, 12 cm, 15 cm

= 3 cm.

Volume of this cube = (3 x 3 x 3) = 27

Number of cubes = = 40.

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Subject: Volume and Surface Areas - Quantitative Aptitude - Arithmetic Ability

How many cubes of 3cm edge can be cut out of a cube of 18cm edge

A) 36 | B) 232 |

C) 216 | D) 484 |

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Subject: Volume and Surface Areas - Quantitative Aptitude - Arithmetic AbilityExam Prep: Bank Exams

Job Role: Bank PO

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. meters. Find the breadth of the wall.

A) 40cm | B) 30cm |

C) 20cm | D) 10cm |

Explanation:

Let the breadth of the wall be x metres.

Then, Height = 5x metres and Length = 40x metres.

x * 5x * 40x = 12.8

=>

=>

=>

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Subject: Volume and Surface Areas - Quantitative Aptitude - Arithmetic Ability

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:

A) 49 | B) 50 |

C) 53.5 | D) 55 |

Explanation:

Area of the wet surface = [2(lb + bh + lh) - lb]

= 2(bh + lh) + lb

= [2 (4 x 1.25 + 6 x 1.25) + 6 x 4]

= 49

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Subject: Volume and Surface Areas - Quantitative Aptitude - Arithmetic Ability