Ask a Doubt
Request a call back

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

CBSE Class 10 Answered

a boat which has a speed of 75km/hr, goes upstream along the wind and returns to tje starting point.the speed of the stream and the wind is 4km/hr and 9km/hr respectively.if the total distance 90 km is covered by the boatin 8 hour,then find the time taken to travel upstream
Asked by Pdas7Pdas743294 | 16 Apr, 2020, 15:00: PM
answered-by-expert Expert Answer
begin mathsize 14px style Speed space of space boat equals 75 km divided by hr Stream equals 4 km divided by hr Wind equals 9 km divided by hr total space distance equals 90 km total space time equals 8 hr upstream relative space speed space of space boat equals 75 space minus space 4 space plus space 9 space equals 80 km divided by hr distance space covered space equals space 45 space km time equals 45 over 80 equals 9 over 16 space hrs Check space your space question space the space data space given space is space wrong comma space it space won apostrophe straight t space take space 8 space hrs space to space complete space entire space journey end style
Answered by Arun | 19 Apr, 2020, 09:45: AM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
your study room is shaped like a rectangle it has a area of 28 square cm and diameter 22 cm can you tell its dimensional
Asked by yogitamanojkumar | 09 Jan, 2023, 16:01: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Meena and Seema alone can complete the whole work in (9y+3) days and 9z days, respectively and Reena and Kisan alone can complete the whole work in (2x + 2) days and (x - y) days, respectively. Reena and Chhaya together can complete the whole work in 18 days and Jaya and Payal together can complete the whole work in 24 days. Payal and Chhaya alone can complete the whole work in (10z + 2) days, and 6z days respectively. Kisan and Ira together can complete the whole work in 120/7 days and Ira and Jaya alone can complete the whole work in (x + y) days and 14z days, respectively. Find x, y and z.
Asked by nk.neetuhome | 18 Nov, 2022, 15:43: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Some student planned a picnic. The budget for the food was ?480.as eight of them failed to join the party, the cost of the food for eachember increase by ?10 find howany student went on the picnic
Asked by Subuhiansari67 | 28 Sep, 2022, 22:11: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Anita and Ritu together have 26 marbles. Both of them lost 3 marbles each, and the product of the number of marbles they now have is 91. Form a quadratic equation  
Asked by sakshi.ch1004 | 11 Sep, 2021, 16:32: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Find two consecutive odd positive integers,sum of whose squares is 290
Asked by ramugirija9496 | 10 Jan, 2021, 19:44: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Two water taps together can fill a tank in 9? hour.the tap of larger diameter taks 10 hour less then the smaller one to fill the tank separately.find the time in which each tap can separately fill the tank. [CBSE(Delhi)2019]
Asked by rbabli091 | 13 Oct, 2020, 21:07: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
 Ruhi’s mother is 26 years older than her. The product of their ages (in years) 3 years from now will be 360. Form a Quadratic equation so as to find Ruhi’s age
Asked by arajeevshashank | 25 Jun, 2020, 19:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
 If I had walked 1 km/hr faster, I would have taken 15 minutes less to walk 3 km. Find the rate at which I was walking.
Asked by arajeevshashank | 25 Jun, 2020, 11:12: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
The angry arjun carried some arrows for fighting with  bheeshm with half the arrows he cut down the arrows thrown by bheeshm on him.And with six other arrows he killed the rath driver of bheeshm with arroweach he respectively knocked down the rath,flag,bow of bheeshm.finally with one more than 4 times square root of arrows he laid bheeshm unconscious on arrow bed.find the total no arrows.
Asked by arajeevshashank | 22 Jun, 2020, 09:21: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
Guru was born in 1809 ad.in year x2 ad he.  was ( x  -3) years old find the value of x
Asked by arajeevshashank | 10 Jun, 2020, 18:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt