Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 8 Answered

a boat goes downstream and cover the distance between two ports in 5 hours while it covers the same distance upstream in 5-1/2 hours. find the speed of boat in still water if t he speed of stream is 1-1/2km/h
Asked by alokkumarbind2123 | 12 Oct, 2023, 04:25: PM
answered-by-expert Expert Answer
Question must be:
A boat goes downstream and cover the distance between two ports in 4 hours while it covers the same distance upstream in 5 hours. find the speed of boat in still water if the speed of stream is 2km/h.
Solution:
Distance between two ports be 'x' km
Let speed of the boat be 'y' km/hr 
Therefore, x = 4(y+2)
Also, x = 5(y - 2)
Therefore, 4(y+2) = 5(y - 2)
i.e. 4y + 8 = 5y - 10
i.e. y = 18
Hence, speed of the boat is 18 km/hr
Answered by Renu Varma | 19 Oct, 2023, 10:20: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 8 - Maths
3(x-5)+5=4-2(x-3)
Asked by khushimitra73 | 22 Mar, 2024, 06:46: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
what is the full form of CPU?
Asked by debarurawtiya | 02 Feb, 2024, 05:28: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
0.3x-5/1.5x+11=-3/5 in this equation find the value of x and then check it .
question image
Asked by shivysharma52 | 27 Nov, 2023, 11:48: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
solve in elimination methods:5m+9=3m-11
Asked by pg7551031 | 30 Oct, 2023, 09:16: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
a boat goes downstream and cover the distance between two ports in 5 hours while it covers the same distance upstream in 5-1/2 hours. find the speed of boat in still water if t he speed of stream is 1-1/2km/h
Asked by alokkumarbind2123 | 12 Oct, 2023, 04:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
Three friends, X, Y and Z complete the work in x days, (x+5) days and 12 days respectively. they started to work together but X left the work after 2 days and just left the work one day before the completion of the work. if the total work completed in (53/9) days, then find the value of x. Answer is -->10  (solve + explain)
Asked by jhajuhi19 | 09 Oct, 2023, 09:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
solve [(3/8)2)-3 ÷ (4/9)]
Asked by anithaanitha39740 | 06 Oct, 2023, 08:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
The degree of equation x²-9=2x' is:
Asked by sharmilarawat880 | 09 Sep, 2023, 10:48: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
if x = 0 , what is the value of x when x =0
Asked by pragatisanwan790 | 07 Jan, 2023, 04:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 8 - Maths
The ratio of number of girls and boys in a class is 1:3. Set up an equation between the students of a class and boys and then draw its graph. Also find the number of boys in a class of 40 students from the graph. 
Asked by manmeetsaini1516 | 29 Jun, 2022, 03:21: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×