Unit-rate conversion — quarter kilogram to grams If 1/4 kg costs Rs 0.60, what is the price for 200 g?

Introduction / Context:
This question tests proportional reasoning when converting between kilograms and grams. Once the per-gram cost is determined (or scaled proportionally), we can compute the price for 200 g directly.

Given Data / Assumptions:

• Cost of 1/4 kg (250 g) = Rs 0.60.
• Find the cost for 200 g.
• Price varies linearly with weight (uniform unit price).

Concept / Approach:
Use direct proportion: cost is proportional to weight. Either compute per-gram price or scale 200 g as a fraction of 250 g.

Step-by-Step Solution:
250 g costs 60 paise.200 g is (200/250) = 0.8 of 250 g.So cost for 200 g = 0.8 × 60 paise = 48 paise.

Verification / Alternative check:
Per-gram price = 60/250 = 0.24 paise per gram. For 200 g: 200 × 0.24 = 48 paise (confirms).

Why Other Options Are Wrong:
40 or 45 paise underestimate; 50 or 60 paise overestimate relative to proportional scaling.

Common Pitfalls:
Mixing rupees and paise or confusing 1/4 kg with 200 g. Note 1/4 kg = 250 g, not 200 g.

Final Answer:
48 paise