Olevel mathematics . Please solve it in detail

9 The ratio of the areas of the bases of two geometrically similar buckets is 4 : 9. (a) The area of the top of the smaller bucket is 480 cm?. What is the area of the top of the larger bucket? Answer .. ............ cm? [1] (b) Write down the ratio of the heights of the two buckets. Answer .......... : .mmmmmm. [1] (c) Both buckets are filled with sand. The mass of sand in the larger bucket is 36 kg. Find the mass of sand in the smaller bucket. 5 The population of a country was 13.1 million. (a) Nine hundred thousand of the population were at least 2 metres tall. How many were less than 2 metres tall? Answer - - [1] (b) 0.2% of the population were over 95 years old. How many were over 95