A firm earns a revenue of Rs 50 when the market price of a good is Rs 10. The market price increase to Rs 15 and the firm now earns a revenue of Rs 150. What is the price elasticity of the firm's supply curve?


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At Price, P1 = Rs 10
Total Revenue, TR1 = P1 x Q1 = 50

= TR1/P1 = Q1

= 50/10 = Q1

= Q1 = 5units

At Price, = Rs 15
Total Revenue, TR2 = P2 x Q2 =150

= Q2 = TR2/P2

= Q2 = 150/15

= Q2 = 10 units

Elasticity of supply,es = ΔQ/ΔP x P/Q

ΔQ = Q2 - Q1 = 10 - 5 = 5

P = P1 - P2 = 15 - 10 = 5

es = 5/5 x 10/5

es = 2.

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