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07 May 2019, 00:37
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83% (01:02) correct
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A machine working at maximum capacity can produce x radial tires in an hour. How many tires can the machine produce if it works continuously at maximum capacity for y minutes?
A. x/(60y)
B. xy/60
C. 60x/y
D. 60/xy
E. 60xy
A. x/(60y)
B. xy/60
C. 60x/y
D. 60/xy
E. 60xy
07 May 2019, 07:33
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It produces x/60 tires per minute, so xy/60 tires in y minutes.
Or: if y is 60 minutes, the answer to the question clearly must be 'x', the number of tires we know the machine produces in an hour. So the answer is B or C. But the longer the machine works, the more tires it makes, so y must be in the numerator, and B is correct.
Or: if y is 60 minutes, the answer to the question clearly must be 'x', the number of tires we know the machine produces in an hour. So the answer is B or C. But the longer the machine works, the more tires it makes, so y must be in the numerator, and B is correct.
07 May 2019, 08:03
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Method 1: 1. Read question, glance at answers and convert any inconsistent units to ensure consistency. It appears that the answer wants you to work in minutes (60 features in a few answers).
2. Create a R T D table for each of the different pieces of work in order to work in an organised manner and plug in missing info from there. In 60mins the machine produces x at max. capacity, therefore its rate is x/60. Same rate for y minutes as the machine works at max. capacity as well. So the question is given this rate, given y minutes what can the machine produce in that time given the respective rate. Well, x/60 * y = xy/60
Method 2: same as above but can use Smart Numbers, preferably two different numbers for x and y which are multiples of 60. Test out the numbers.
2. Create a R T D table for each of the different pieces of work in order to work in an organised manner and plug in missing info from there. In 60mins the machine produces x at max. capacity, therefore its rate is x/60. Same rate for y minutes as the machine works at max. capacity as well. So the question is given this rate, given y minutes what can the machine produce in that time given the respective rate. Well, x/60 * y = xy/60
Method 2: same as above but can use Smart Numbers, preferably two different numbers for x and y which are multiples of 60. Test out the numbers.
