A takes 8 hours more than the time taken by B to covera distance of 160 km. IfA doubles his speed, he takes 3 hours more than
B to cover the same distance. The speed (in km/h) of is:
This questions was previously asked in
SSC CGL 17th August 2021 Shift-1
Explanation:
Correct option 4: 80
Let the speed be VA and VB
According to the question
=160/VA-160/VB = 8....(1)
⇒ 160/2VA-160/VB = 3
80/VA-160/VB = 3........(2)
Multiplying equation (1) by 1/2 we get,
=80/VA-80/VB = 4........(3)
Now,
Substituting equation (2) and (3) we get,
⇒ 80/VA - 160/VB = 3 and 80/VA - 80/VB= 4
⇒160/VB-80/VB=4-3
⇒ S = 80 km/h
The speed of B is 80 km/h
![]()
By: santosh