Final answer:
To find out the cost of 10 kg of bananas, we can set up a ratio using the given information and find the unknown cost using cross multiplication.
Step-by-step explanation:
To find out how much 10 kg of bananas would cost, we can set up a ratio using the given information. Let's set up the ratio:
31 kg of bananas = $124
10 kg of bananas = $x (the unknown cost)
Using cross multiplication, we can find the value of x:
31 kg of bananas * $x = 10 kg of bananas * $124
Simplifying the equation, we get:
$x = (10 kg of bananas * $124) ÷ 31 kg of bananas
$x = $40
Therefore, 10 kg of bananas will cost $40.