Question

9. A boat travels at 8 km per hour. How much will the boat travel in two and a half hour?
20 km
12 km
13 km
14 km​

Answer 1

• $\huge\red{\mid{\fbox{\tt(answer)}\mid}}$
• Speed in still water=
• time
• distance
• =(8+8)/2=8km/h
• Now speed during going down the stream motion will be 8+4=12km/h so time taken in down the stream journey t
• 1
• =
• speed
• distance
• =8/12=2/3hour
• Speed during up the stream will be 8−4=4km/h so time in going down the stream, t
• 2
• =
• speed
• distance
• =8/4=2Hour
• Time for the trip, t
• 1
• +t
• 2
• =2Hour40Minutes.
• Option B is correct.

Answer 2

20Km

Step-by-step explanation:

Distance travels in one hour = 8km

Distance travels in half hour = 8/2 = 4km

Distance travel in 2 and half hour = 8 + 8 + 4

= 20Km

Hence,the answer is 20km