Ask a Doubt
Request a call back

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

CBSE Class 10 Answered

Places A and B apart from highway.A car starts from A point and other from B at the same time. If they go in the same direction,they meet in 9 hours and if they go in opposite direction, they meet in 9/7 hours.find their speeds.
Asked by Dy577080 | 31 Mar, 2019, 07:34: AM
answered-by-expert Expert Answer
Let d be the distance between location-A and location-B.
 
If car travels from A towards B with speed vA and another car travels from B towards A with speed vB, then we have
 
(9/7) vA + (9/7) vB = d  ............................(1)
 
If car travels from A towards B with speed vA and another car travels from B in same direction with speed vB,
 
then we have ,    9 vA  - 9 vB = d  ............................(2)
 
By equating, (1) and (2), we have,  vA + vB = 7 (  vA  -  vB )   or   6 vA  = 8 vB  or  vA  = (4/3)vB    
 
hence the ratio of speeds of cars staring from A and B is 4 : 3
Answered by Thiyagarajan K | 31 Mar, 2019, 12:22: PM

Application Videos

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 10 - Maths
a fraction became 9 upon 11 if 2 is add to the both and 3 is add to both 5 upon 6 find the fraction
Asked by dheerrana109 | 22 Jul, 2024, 10:26: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
6x²+x-1
Asked by ishakkumbhar92 | 20 Jul, 2024, 16:09: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
the peth of an APq and qth term is p find its p+q(th)term
Asked by vishwanathhikkalagutti | 17 Jul, 2024, 07:25: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
if 3 meter cloth price 400 then 75 centimeter cloth price
Asked by avadheshkumar94 | 13 Jul, 2024, 20:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
show That points(1,-1),(5,2)and(9,5)are collinear
Asked by 3ra2231 | 11 Jul, 2024, 20:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
What is réal number
Asked by avadheshkumar94 | 10 Jul, 2024, 10:14: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
prove that sinA-cosA+1/sinA+cosA-1 =1/secA-tanA
Asked by syashkurun | 08 Jul, 2024, 19:14: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
what is the angle between two parallel lines
Asked by francissaka528 | 08 Jul, 2024, 06:15: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
solve the following pair of linear equation 5x+4y=9 , x + 2y =3
Asked by radhe9868017031 | 05 Jul, 2024, 14:10: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 10 - Maths
5x-4y+8=0, 7x+6y-9=0 consistent or inconsistent
Asked by naidulokesh892 | 04 Jul, 2024, 20:42: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Are You a Teacher or a Parent Seeking Customised Tests? Click here
×