Question

2. The length, breadth and height of a rectangular prayer hall are 20 m, 15 m and 8 m
respectively. Find the cost of painting its walls at 10 per sq m.​

Answer 1

Answer:

dude can u please tell what is the doors length and breath u can find answer in only that way if not

multiply the l and b (to find area of wall)

and multiply the cost

if the ques asks the volume

then use the same formula just in the first step multiply all the length breath and height

Step-by-step explanation:

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Answer 2

Length of 2 walls = 20 m

Height of 2 walls = 8 m

Area of 1 wall = 20 × 8 m² = 160 m²

Area of 2 walls = 160 × 2 m² = 320 m²

Breadth of another 2 walls = 15 m

Height of another 2 walls = 8 m

Area of 1 wall = 15 × 8 m² = 120 m²

Area of 2 walls = 120 × 2 m² = 240 m²

Area of all walls = 240 + 320 m² = 560 m²

Cost of painting 1 m² = Rs 10

Cost of painting 560 m² = Rs 560 × 10 = Rs 5600

Therefore the cost of painting the walls at 10 per sq m is Rs 5600.

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