Question

A godown is 65 m long, 43 m broad and 11m high. Find the cost of whitewashing its four walls and ceiling at rupees 21.50 per sq. m.​

Answer 1

Answer:

Rs 111,176.5

Given:-

lenght=65 m

breadth=43 m

height=11 m

Solution:-

We know that

Area of four walls=2h(l+b)

=2×11(65+43)

=22×108

=2376 m^2

Area of ceiling=l×b

=65×43

=2795

Total area to be white washed=(2376+2795)m^2

=5171 m^2

Rate of white washing=21.50 m

Total cost of white washing=5171×21.50

=Rs 111,176.5

__________

Cost of white washing and ceiling it's four wall=Rs 111,176.5

Answer 2

MENSURATION :

Length of Godown = 65 m

Width of Godown = 43 m

Height of Godown = 11 m

That means the Godown is in cuboidal shape.

For whitewashing, we need to find godown's surface area. (Note : For 4 walls)

Area of 4 walls = 2( Length + Width ) × Height

Area = 2 ( 65 + 43 ) × 11

Area = 2 ( 108) × 11

Area 1 = 216 × 11 = 2376 m^2

For whitewashing ceiling too,

Area 2 = 2376 + ( Length × breadth )

Area 2 = 2376 + ( 65 × 43 )

Area 2 = 2376 + 2795 = 5171 m^2

Cost of white washing = 21.5 × 5171 = Rs. 19176.5