Question

if the cost of painting a wall is Rupees 336 at the rate of Rupees 2 per sq m. find length. if the breadth is 120 cm

Answer 1

Answer:

Length of the wall is 140 m.

Step-by-step explanation:

It is given that the cost of painting a wall is Rupees 336 at the rate of Rupees 2 per sq m.

= >  Cost of painting = Rate of painting x area to be painted

= >  Rs 336 = Rs 2 / m^2 x Area to be painted

= >  Rs 336 x m^2 / Rs 2 = Area to be painted

= >  336 m^2 / 2 = Area to be painted

= >  168 m^2 = Area to be painted.

Hence,

Area of the wall is 168 m^2 .

Given,

 Breadth of the wall = 120 cm

                     = > 120 / 100 m

                     = > 1.2 m

Therefore,

= >  Area of wall = length x height ( or breadth, in this case )

= >  168 m^2 = 1.2 m x length

= >  168 m^2 / 1.2 m = length

= >  140 m = length

Hence,

Length of the wall is 140 m.

Answer 2

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Given :-

•°• Cost Of painting a Wall = ₹336

•°•Rate of painting that wall=2 per sq .m

As we know that,

【Cost of painting the wall = Area of the wall ×rate of painting that wall】

=>
336 ₹. = area of the wall × ₹2 sq cm

336/2m^2= area of the wall

336 /2m^2 = area of the wall

•°•168 m ^2 = area of the wall

•°• Area of the wall = 168 m^2

♏Hence area of the wall = 168m^2

♏Area of the wall = Length × breadth

♏168 m^2= Length × 1.2 m

♏Length = 168 m^2 /1.2 m

=140 m

✔️Hence the length of the wall = 140 m

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