Question

formula area wall: length 6m50cm, breadth5m, height 3m​

Answer 1

Answer:

Area to be whitewashed = area of four walls + area of ceiling

Formulas to be noted :−

Area of four walls =2 ( length + breadth ) × height

Area of ceiling = area of rectangle = length × breadth

In the question, length of the room =6m

breadth of the room =4.5m

height of the room =3m

On the basis of formulas given above :−

Area of four walls =2(6m+4.5m)x3m

Area of four walls =2(10.5m)x3m

Area of four walls =21mx3m

Area of four walls =63m

Area of ceiling =6m×4.5m

Area of ceiling =27m

Therefore, area to be whitewashed =63m

+27m

Area to be whitewashed =90m

Cost of whitewashing = rate at which area is being whitewashed × area to be whitewashed

Cost of whitewashing =Rs8/m

×90m

Cost of whitewashing =Rs8×90

Cost of whitewashing =Rs.720.

i hope its help you