VyshakhR1995 wrote:
A machine at the golf ball factory can produce 16 golf balls in 5 minutes. If several of these machines work independently and each machine performs at the same rate, how many machines are needed to produce 32 golf balls per minute?
A) 3
B) 6
C) 8
D) 10
E) 13
Let's answer the question in steps...
GIVEN:
1 machine produces
16 golf balls in
5 minutes.
So,
1 machine produces
16/5 golf balls in
1 minute
[if we have 1/5 the time, then the output is 1/5 as much]So,
5 machines produce
16 golf balls in
1 minute
[if we have 5 times the number of machines, then the output is 5 times as much]So,
10 machines produce
32 golf balls in
1 minute
[if we double the number of machines, then the output is doubled]Answer: D
Cheers,
Brent
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