7. A boy can row 1km upstream in 20 minutes and back to his starting point in 12 minutes . How long would he take to row 1 km in still water??
those who will answer this question will be marked as brainlist
Answers
Answered by
3
Step-by-step explanation:
If his speed is x mtr/min in still water and w mtr/minis speed of water, then
x-w= 1000/20=50
x+w= 1000/12= 250/3
adding
2x= 50 + 250/3= 400/3
x=200/3 mtrs/min
time taken to row 1 kms in still water = 1000/(200/3)= 15 mins.
himanshibajaj42:
thanku your answer is write you are the brainless congratulations
its my pleasure
welcome
no problem
☺️
Answered by
1
Answer:
Upstream speed, U
=1 km1060hr= 6 km/hr
Downstream speed, D
=1 km460hr=15 km/hr
Speed of the stream, y =D−U2
=15−62=92=4.5 km/hr
thanku for answering but your answer is wrong
15 mins is the write answer
Yes, answer is wrong
15 mins is the write answer
Similar questions