Answer: Median price = ₹ 32
Treat \"less than 20\" as 0–20. Cumulative frequencies: 140, 240, 320, 380, 400. N = 400, N/2 = 200.
The cumulative frequency first exceeds 200 in class 20–40, so it is the median class: L = 20, f = 100, cf (before) = 140, h = 20.
\(\text{Median} = L + \left(\dfrac{N/2 - cf}{f}\right)h = 20 + \dfrac{200 - 140}{100} \times 20 = 20 + 12 = 32\).