Question

If a log boat travels 4km in one hour, how long will it take to go 10km?

Answer 1

Equate speed.

D1/T1=D2/T2

4/1=10/T2

T2=10/4

Time=2.5 hrs

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Answer 2

$\boxed{\boxed{\boxed{\bold{\green{Hey,\: here's\: your \: solution}}}}}$
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$<b><u><i> Given -</i></u></b>$

Distance travelled by boat = 4 km
Time taken = 1 hour
______________________________
$<b><i><u>To find -</u></i></b>$

Time taken by boat to cover 10 km
______________________________
$<b><i><u>Solution -</u></i></b>$

Distance covered = 4 km
Time taken = 1 hour

Hence, speed of car
= distance/time
= 4/1
= 4 km/h

Hence, the speed of boat is 4 km/h

Now,
Speed of boat = 4 km/h
Distance to be covered = 10 km

Hence, time taken
= distance/speed
= 10/4
= 2.5 hours
______________________________
$\red{Hence,\: the\: boat \: will \: take\: 2\: and\: a \: half \: hour\: to \: cover\: 10\: km.\: Hope\: it\: helps\: you.}$