Question: If 48 kg of bananas cost $120, how much will 20 kg cost?
(A) $45
(B) $50
(C) $55
(D) $60
Solution:
Step 1: Find the cost per kg of bananas.
Cost per kg=120dollars/48kg=2.5dollars/kg
Step 2: Use the unitary method to find the cost of 20 kg.
Cost of 20 kg=20kg×2.5dollars/kg=50dollars
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