Question

Find the cost of painting a wall of length 20 m and breadth 15 m at the rate of 12 per unit.

Answer 1

Step-by-step explanation:

p=2(l+b)

=2(20m+15m)

=3×35m=105m

the rate of 1 m=rs12

the rate of 105m =12×105

=1296

Answer 2

$\huge\bf\red{Question}$

Find the cost of painting a wall of length 20 m and breadth 15 m at the rate of 12 per unit.

$\huge\bf\red{Given-}$

Length = 20 m

Breadth = 15 m

Rate = 12 per unit

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$2(l \times b)$

$2(20 \times 15)$

$2(35)$

$2 + 35 = 37$

Rate of per unit =

$12 \times 37$

$= 444$

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