Question

A garland of roses contains $20$ flowers, and flower costs $15$ dollars. A garland of lilies contains $15$ flowers, and each flower costs $20$ dollars. What is the cost of each of these garlands?

• A. $3,000$ dollars
• B. $300$ dollars
• C. $30$ dollars
• D. None of the above

Answer 1

The correct option is B $300$ dollars

$\underset{–}{\text{Roses Garland:}}$
Number of flowers in garland = $20$
Cost of each flower = $15$ dollars
$\therefore$ Cost of roses garland = $20\times 15=2\times 15\times 10=300$ dollars

$\underset{–}{\text{Lilies Garland:}}$
Number of flower in garland = $15$
Cost of each flower = $20$ dollars
$\therefore$ Cost of lilies garland = $15\times 20=20\times 15=300$
(By commutative property $15\times 20=20\times 15=300$)

Therefore, Cost of each garland = $300$ dollars
(b) is the correct option