According to the rate of water charge the minimum cost upto 27 units is Rs. 1910 and then Rs. 72 per unit for additional use. If a household used 30 units of water then find water charge to be paid.​

The edge of a cube was found to be 30 cm with a possible error in measurement of 0.4 cm. use differentials to estimate the maximum possible error, relative error, and percentage error in computing the volume of the cube and the surface area of the cube. (round your answers to four decimal places.) (a) the volume of the cube maximum possible error cm3 relative error percentage error % (b) the surface area of the cube maximum possible error cm2 relative error percentage error %