A soap manufacturer is capable of selling soaps at ₹6.36 per piece aftee adding the VAT at the rate of 6%.Still, he will make a profit of 20% on the sale. What is the manufacturing cost per soap?
For the curve y=5x - 2x^3 ,if x increases at the rate of 2units/sec, then at x=3 slope of the curve is changing at_