The market price changes from Rs.5 to Rs.20. As a result, the quantity supplied by a firm increases by 15 units. The price elasticity of the firm's supply curve is `0.5`. Find the initial and final quantity sold of the firm.

The market price of a good changes from ₹5 to ₹20. As result, the quantity supplied by a firm increasae by 15 units. The preice elasticity of the firm's supply curve us 0.5 . Find the initial and final output levels of the firms.

When the price of a commodity falls from Rs.10 to Rs.9 per unit, its quantity falls by 30% . Calculate price elasticity of supply.