An electric cable of length 150 m is cut into pieces in such a way that the length of each piece follows the arithmetic progression. If the shortest piece is 0.20 m and the longest piece is 1 m;
a) how many pieces of electric cable can be made out? ( 7 marks )
b) find the sum of the first 20 pieces of electrical cable. ( 3 marks )
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2018-08-03T13:25:09-0400
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