Question

MEDAL AND FAN

Niles and Bob sailed at the same time for the same length of time. Niles' sailboat traveled 21 miles at a speed of 7 mph, while Bob's motorboat traveled 45 miles at a speed of 15 mph. For how long were Niles and Bob traveling?

4 hours

6 hours

3 hours

5 hours

Answer 1

so.. check your book for the "distance" formula firstly, what... does it show?

Answer 2

Include a picture as well=)

Answer 3

Clarify please

Answer 4

i think its B

Answer 5

why not C? or D?

Answer 6

notice \(\begin{array}{lccclll}
&distance&rate&time
\\\hline\\
Niles&21&7&t\\
Bob&45&15&t
\end{array}\)

tis just a system of equations, so, solve for "t"

Answer 7

bc u have to add in the hours that bob traviled

Answer 8

i get none of this (@~@)

Answer 9

im pretty sure its B

Answer 10

ok let me see

Answer 11

wrong it was C

Answer 12

hehehe, well, @Kate_Kat magic 8ball is saying B, so, how come? who knows, tis a magiic 8ball :/

Answer 13

? that makes no since

Answer 14

here is the explaination

The amount of time that Niles and Bob were traveling is the same or equal. So, calculate either Niles' time or Bob's time.

Calculate Niles' time below.

21 miles ÷ 7 mph = 3 hours

Bob's time is the same.

45 miles ÷ 15 mph = 3 hours

So, Niles and Bob were traveling for 3 hours.

Answer 15

i would have said B too

Answer 16

This is a TMI problem: too much information!
Nowhere in the problem does it say the 2 guys interacted with each other; they didn't race, they didn't collide, perhaps they didn't even see one another.

Pick your favorite guy and figure out how long he sailed. t = d/r.

And then you have it!! The same sail time applies to the other guy as well.

Two answers for the price of one!

Answer 17

ohhhhhhh ok fan and medal for u @mathmale

Answer 18

Many, many thanks. Thanks to Niles and Bob for having made this fine moment possible.

Answer 19

lol (^w^)