Q no. 49# The annual rainfalls at7 raingauge stations in a basin are 58, 94, 60, 45,20, 88 and 68cm respectively. What is the percentage accuracy of the existing network in the estimation of the average depth of rainfall over the basin? How many additional gauges are required if it is desired to limit the error to only 10%.

Standards are technical publications designed to ensure the reliability of goods, products, methods, or services. They establish technical requirements, specifications, guidelines, features, or design procedures. Standards recommend a set of tolerance fo…