(a) Given the following data, calculate the population at the end of…

Question

(a) Given the following data, calculate the population at the end of next three decades by decrease rate method :

| YEAR | 1940 | 1950 | 1960 | 1970 |

|---|---|---|---|---|

| Population | 80,000 | 1,20,000 | 1,68,000 | 2,28,580 |

(b) Write a short note on provision for 'fire demand' in water supply.