a-hot-air-balloon-is-descending-vertically-at-a-rate-of-3-and-nbspftsec3text-fts

Question

A hot air balloon is descending vertically at a rate of 3 ft/s3	ext{ ft/s}. If there is a person standing 40 ft40	ext{ ft} away from the point right below the balloon, how fast is the distance between the person and the balloon decreasing when the balloon is 30 ft30	ext{ ft} above the ground?

Accepted Answer

1.8 ft/s1.8\,	ext{ft/s}

Answer

0.8 ft/s0.8\,	ext{ft/s}

Answer

2.8 ft/s2.8\,	ext{ft/s}

Answer

5 ft/s5\,	ext{ft/s}