Mathematics MCQs

Page No. 77

Two taps X and Y can fill a tank in 10 hrs. and 15 hrs.respectively. If the both taps are opened together, the tank will be full in_________?


a3 hrs.

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b4 hrs,

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c5 hrs.

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d6 hrs.

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View Answer 6 hrs.

A is thrice as good as B in work. A is able to finish a job in 60 days less than B. They can finish the work in___________days if they work together.


a18 days

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b22 ½ days

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c24 days

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d26 days

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View Answer 22 ½ days

A and B can finish a work 30 days if they work together. They worked together for 20 days and then B left. A finished the remaining work in another 20 days. In how many days A alone can finish the work?


a70

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b50

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c40

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d60

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View Answer 60

P and Q can complete a work in 15 days and 10 days respectively. They started the work together and then Q left after 2 days. P alone completed the remaining work. The work was finished in__________days.


a12

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b15

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c22

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d20

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View Answer 12

A cuboidal, block of 6 cm X 9 cm X 12 cm is cut up into an exact number of equal cubes. The least possible number of cubes will be_________?


a6

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b9

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c24

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d30

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View Answer 24

What is the volume of a cube (in cubic cm) whose diagonal measures 4√3 cm ?


a8

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b16

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c27

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d64

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View Answer 64

The edges of a cuboid are in the ratio 1 : 2 : 3 and its sunface area is 88 cm2. The volume of the cuboid is :_________?


a24 cm3

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b48 cm3

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c64 cm3

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d120 cm3

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View Answer 48 cm3

The areas of the three adjacent faces of a rectangular box which meet in a point are known. The product of these areas is equal to :___________?


athe volume of the box

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btwice the volume of the box

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cthe square of the volume of the box

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dthe cube root of the volume of the box

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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 man is :__________?


a12 kg

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b60 kg

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c72 kg

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d96 kg

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View Answer 60 kg

The capacity of a cylindrical tank is 246.4 litres. If the height is 4 metres, what is the diameter of the base ?


a1.4 m

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b2.8 m

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c14 m

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dNone of these

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View Answer None of these

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