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Solution


Q.

Assertion (A): Two cubes each of edge length 10 cm are joined together. The total surface area of newly formed cuboid is 1200 cm2.

Reason (R): Area of each surface of a cube of side 10 cm is 100 cm2.
1 Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)  
2 Both assertion (A) and reason (R) are true and reason (R) is not the correct explanation of Assertion (A)  
3 Assertion (A) is true but reason(R) is false.  
4 Assertion (A) is false but reason(R) is true.  

Ans.

(4)     Assertion (A) is false but reason(R) is true