(A) 08 Hours
(B) 10 Hours
(C) 12 Hours
(D) 16 Hours
Correct Option is: C
The total time of journey = 20 hours.
Let ‘x’ hours be the time that shreya travelled at 160 kmph
Therefore, 20-x hours would be time that she travelled at 240 kmph.
Hence, she would have covered x*160+(20-x)*240 kms in the 20 hours = 3840 kms
x*160+(20-x)*240 =3840
160x +4800-240x =3840
240x-160x=4800-3840
80x= 960
X=960/80=12 hrs