Question

the floor of a rectangular hall has a perimeter of cost 250m. its height is 6cm find the cost of painting its 4 wall at the rate of 6₹ sq.m​

Answer 1

$\bf\large{\underline{Question:-}}$

the floor of a rectangular hall has a perimeter of cost 250m. its height is 6cm find the cost of painting its 4 wall at the rate of 6₹ sq.m

$\bf\large{\underline{Given :-}}$

• perimeter = 250 sq.m
• height=6cmm
• cost of painting of 4 wall at the rate of 6₹

$\bf\large{\underline{To\:find:-}}$

• cost of painting = ?

$\bf\large{\underline{Solution:-}}$

$\bf→ Perimeter\:of\:floor = 250m\\\bf→ 2(l+b)=250\\\bf→ height = 6cm$

Lateral surface area = 2(l+b)×h

→ 250×6

→ 1500$\bf m^2$

$\bf→ 1m^2\:rate\:of\: painting=6 Rs.\\\bf→ 1500×6 = 9000 Rs.$

Hence,

the cost of painting of its 4 wall is 9000 .Rs

Answer 2

$\bf\large{\underline{Question:-}}$

the floor of a rectangular hall has a perimeter of cost 250m. its height is 6cm find the cost of painting its 4 wall at the rate of 6₹ sq.m

$\bf\large{\underline{Given :-}}$

• perimeter = 250 sq.m
• height=6cmm
• cost of painting of 4 wall at the rate of 6₹

$\bf\large{\underline{To\:find:-}}$

• cost of painting = ?

$\bf\large{\underline{Solution:-}}$

$\tt→ Perimeter\:of\:floor = 250m\\\tt→ 2(l+b)=250\\\tt→ height = 6cm$

Lateral surface area = 2(l+b)×h

→ 250×6

→ 1500$\bf m^2$

$\tt→ 1m^2\:rate\:of\: painting=6 Rs.\\\tt→ 1500×6 = 9000 Rs.$

Hence,

the cost of painting of its 4 wall is = 9000 .Rs