Friday

August 29, 2014

August 29, 2014

Posted by **Babiinoob** on Thursday, October 6, 2011 at 7:52pm.

How long will it take the boat to make the return trip downstream? (Assume the boat retains the speed travelled upstream)

Working out please

- Maths -
**Steve**, Friday, October 7, 2011 at 5:45amu = boat speed

u-3 = upstream speed

u+3 = downstream speed

distance = speed * time

35 = (u-3) * 5/6

210 = 5u - 15

225 = 5u

45 = u

downstream,

35 = 48 * t

t = 35/48

t = 0.729 hr = 43min 45 sec

**Related Questions**

UPSTREAM - THIS EXURSION WITH A BOAT TRAVEL 35KM UPSTREAM AND THEN BACK AGAIN IN...

math - A boat travels 8km upstream and back in 2 hours. If the current flows at ...

physics - A boat that travels at a speed of 6.75 m/s in still water is to go ...

Physics - A boat moves through the water of a river at 5 m/s relative to the ...

Physics - A boat moves through the water of a river at 5 m/s relative to the ...

physics - a boat that travels at a speed of 6.75 m/s in still water is to go ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - A boat travels at 3.8 m/s and heads straight across a river 240m wide ...

Physics - URGENT - A boat travels at 3.8 m/s and heads straight across a river ...