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.


b4 hrs,


c5 hrs.


d6 hrs.


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


b22 ½ days


c24 days


d26 days


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


b50


c40


d60


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


b15


c22


d20


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


b9


c24


d30


View Answer 24

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


a8


b16


c27


d64


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


b48 cm3


c64 cm3


d120 cm3


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


btwice the volume of the box


cthe square of the volume of the box


dthe cube root of the volume of the box



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


b60 kg


c72 kg


d96 kg


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


b2.8 m


c14 m


dNone of these


View Answer None of these

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