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(i) The increase in population is 589 million (ie 1028 - 439)
589,000,000
(ii) Radius of earth = 6400 km
Radius of mars = 4300000 m = 4300 km
hence, radius of earth > radius of mars
It is greater by 2,100 km (ie 6400 - 4300)
(iii) 3,199,203 - three million one hundred ninety-nine thousand two hundred and three
2,318,822 two million three hundred eighteen thousand eight hundred and twenty-two
Difference in number of children getting polio drops = 4,230
(2,16,813 - 2,12,583)
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