Ex – 12.1 Que No. 5 Q.5) A hemispherical depression is cut out from one face of a cubical wooden block such that the diameter l of the hemisphere is equal to the edge of the cube. Determine the surface area of the remaining solid. Solution:-
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Ex – 12.1 Que No. 4 Q.4) A cubical block of side 7 cm is surmounted by a hemisphere. What is the greatest diameter the hemisphere can have? Find the surface area of the solid. Solution:-
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Ex – 12.1 Que No. 2 Q.2) A vessel is in the form of a hollow hemisphere mounted by a hollow cylinder. The diameter of the hemisphere is 14 cm and the total height of the vessel is 13 cm. Find the inner surface area of the vessel. Solution:-
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Ex – 12.1 Que No. 1 Q.1) 2 cubes each of volume 64 cm3 are joined end to end. Find the surface area of the resulting cuboid. Solution:-
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Ex – 14.1 Que No. 25 Q.25) Which of the following arguments are correct and which are not correct? Give reasonsfor your answer. Solution:-
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Ex – 14.1 Que No. 24 Q.24) A die is thrown twice. What is the probability that [Hint : Throwing a die twice and throwing two dice simultaneously are treated as the same experiment] Solution:-
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Ex – 14.1 Que No. 23 Q.23) A game consists of tossing a one rupee coin 3 times and noting its outcome each time. Hanif wins if all the tosses give the same result i.e., three heads or three tails, and loses otherwise. Calculate the probability that Hanif will lose the game. Solution:-
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Ex – 14.1 Que No. 22 Q.22) Refer to Example 13. Solution:-
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Ex – 14.1 Que No. 21 Q.21) A lot consists of 144 ball pens of which 20 are defective and the others are good. Nuri will buy a pen if it is good, but will not buy if it is defective. The shopkeeper draws one pen at random and gives it to her. What is
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Ex – 14.1 Que No. 20 Q.20) Suppose you drop a die at random on the rectangular region shown in Fig. 14.6. What is the probability that it will land inside the circle with diameter 1m? Solution:-
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