Question
The population of a city is decreased by 20% in the
first year and then increased by 30% in the second year. Find the population of the city at the end of the second year, if two years ago the population was 16,000.Solution
Required population = 16000 × 0.80 × 1.3 = 16640
Calculate the volume of a sphere whose diameter measures 21 cm. (Take π = 22/7)
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