- #1

sp3sp2sp

- 100

- 4

## Homework Statement

Arthur and Robin both can run at speed v_r and walk at speed v_w, with v_r > v_w. They set off together on a journey of distance D. Robin walks half of the distance and runs the other half. Arthur walks half of the

*time*and runs the other half.

How long does it take Robin to cover the distance D?

Express the time taken by Robin in terms of v_r, v_w, and D.

## Homework Equations

v = d/t and t = d/v

## The Attempt at a Solution

total time = (D/2)/(v_w) + (D/2)/(v_r)

= D/(2v_w) + D/(2v_r)

I just wanted to check before I submit this , thanks for any help

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