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Question
Based on the information below, how much did a certain telephone call cost? 1. The call lasted 1 minute 27 seconds 2. The cost for the first 30 second unit is Tk. 1.80, call duration more than 30 seconds costs Tk. 0.90 per 30 second unit 3. Any call duration less than 30 seconds is rounded up to the nearest 30-second unit.
Tk. 1.80
Tk. 2.61
Tk. 2.70
Tk. 3.51
Tk. 3.60
ANSWER : 5
Descrption
<p>The call lasted for 1 minute and 27 seconds, which is a total of 87 seconds. Any call duration of less than 30 seconds is rounded up to the nearest 30-second unit, so the duration of this call will be rounded up to 90 seconds, which is 3 units of 30 seconds.</p><p>The first 30-second unit costs Tk. 1.80, so the cost of the first unit is Tk. 1.80.</p><p>The remaining 2 units of 30 seconds each cost Tk. 0.90 per unit, so the cost of the remaining units is Tk. 0.90 x 2 = Tk. 1.80.</p><p>Therefore, the total cost of the call is Tk. 1.80 + Tk. 1.80 = Tk. 3.60.</p>
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