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  4. Find the sum of the lengths of the edges of a prism whose base is a triangle with sides 3 cm , 4 cm , 5 cm and height 10 cm. The following steps are involved in solving the above problem. Arrange them in sequential order. (A) The sum of the lengths of the edges of a prism =2 (the perimeter of base) + number of sides of the base x the height of the prism =24+3 × 10 (B) The perimeter of the base =(3+4+5) cm = 12 cm and the number of sides of the base is 3 . (C) ∴ The sum of the lengths of the edges of a prism =24+30=54 cm

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Q. Find the sum of the lengths of the edges of a prism whose base is a triangle with sides $3 cm , 4 cm , 5 cm$ and height $10 cm$. The following steps are involved in solving the above problem. Arrange them in sequential order. (A) The sum of the lengths of the edges of a prism $=2$ (the perimeter of base) + number of sides of the base $x$ the height of the prism $=24+3 \times 10$ (B) The perimeter of the base $=(3+4+5) cm =$ $12 cm$ and the number of sides of the base is 3 . (C) $\therefore$ The sum of the lengths of the edges of a prism $=24+30=54 cm$

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Solution:

(B), $( A )$ and $(C)$ is the required sequential order.