1998 CEMC Gauss (Grade 7) Problems/Problem 5

Problem

If a machine produces 150 items in one minute, how many would it produce in 10 seconds?

$\text{(A)}\ 10 \qquad \text{(B)}\ 15 \qquad \text{(C)}\ 20 \qquad \text{(D)}\ 25 \qquad \text{(E)}\ 30$

Solution

The machine produces $150$ items in one minute, or $60$ seconds. Therefore, in 10 seconds, the machine will produce $\frac{150}{60} \cdot 10 = \boxed{25}$ items.

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1998 CEMC Gauss (Grade 7) Problems/Problem 5

Problem

Solution