Jeremy can row 3/8 of a mile in 1/4 of an hour.

Mathematics

1 answer:

Elza [17]3 years ago

6 0

Answer:

3/2 mph

Step-by-step explanation:

$\frac{3}{8}$ = $\frac{r}{4}$

cross-multiply: 8r = 12

r = 12/8 or 1.5 mph

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Step-by-step explanation:

The circumference of a circle with radius $r$ is given by $C=2\pi r$ . The length of an arc is makes up part of this circumference, and is directly proportion to the central angle of the arc. Since there are 360 degrees in a circle, the length of an arc with central angle $\theta^{\circ}$ is equal to $2\pi r\cdot \frac{\theta}{360}$ .

Formulas at a glance:

Circumference of a circle with radius $r$ : $C=2\pi r$
Length of an arc with central angle $\theta^{\circ}$ : $\ell_{arc}=2\pi r\cdot \frac{\theta}{360}$