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20 Mar 2020, 02:49
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At Car Part Corporation, there is a machine that produces brake pads. As the machine works, a wheel assembly turns. After the wheel assembly turns 4.09× 10^6 times, the machine needs maintenance. Since being installed, the machine has received maintenance 30 times. Approximately how many total turns had the wheel assembly made when the machine last received maintenance?
A. 1.3 × 10^5
B. 1.2 × 10^7
C. 1.2 × 10^8
D. 4.1 × 10^7
E. 7.0 × 10^8
Are You Up For the Challenge: 700 Level Questions
A. 1.3 × 10^5
B. 1.2 × 10^7
C. 1.2 × 10^8
D. 4.1 × 10^7
E. 7.0 × 10^8
Are You Up For the Challenge: 700 Level Questions
Archit3110
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20 Mar 2020, 09:46
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every service is done at 4.09*10^6 times of turns
so at 30th service the machine must have run ;
4.09*10^6*30 ; ~1.2*10^8
IMO C
so at 30th service the machine must have run ;
4.09*10^6*30 ; ~1.2*10^8
IMO C
Bunuel
20 Mar 2020, 15:41
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It asks about the number of turns since the last maintenance. It obviously has to be less than 4.09× 10^6. Hence A
