Question

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Answer 1

Answer:

6. 18cm^2

7. (i) 20m^2

   (ii) 4000/-

Step-by-step explanation:

6)

so, we can say that the size of the margin is [(ar.cardboard) - (ar.picture)]

=> dimensions of picture =

      l = 14 - 2(0.5) = 14-1 = 13cm

      b =  5 - 2(0.5) = 5-1 = 4cm

      ar. = l x b = 13 x 4 = 52$cm^2$

=> dimensions of cardboard =

     l = 14cm

     b = 5cm

     ar. = l x b = 14 x 5  = 70$cm^2$

=> (ar.cardboard) - (ar.picture)

=> 70 - 52 = 18cm^2

7)

(i) here, the length of the room and verandha will remain the same. so

dimensions are -

     l = 8m

     b = 2.5 m

     ar. = l x b = 8 v 2.5 = 20m^2

(ii) cost of cementing per sq.m = 200/-

cost of cementing verandah = 20 * 200 = 4000/-