5
Q:
A) 4/3 hrs | B) 2/3 hrs |
C) 3/2 hrs | D) 1/4 hrs |
Answer: B) 2/3 hrs
Explanation:
Explanation:
Let the original speed and time is S and T
then distance = S x T
Now the speed changes to 2/3S and T is T+20
As the distance is same
S x T = 2/3Sx(T+20)
solving this we get t = 40 minutes
=40/60 = 2/3 hour