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Answer : 2 21 months Explanation : Answer: B) 21 months Explanation: Total savings = 200 200 200 240 280 ... to n months = 11040= 120 80 160 40 200 240 ....n terms= 40 80 120 160 200 240 ...n terms= n/2[2a (n-1)d] 80 40 = 11040= n/2[240 (n-1)40] = 10920= n[6 n-1] = 546= n[n 5] = 546n = 21

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