Question

Q
A person leaves Hyderabad at 7:00 a.m. and reaches
Chennai, which is at a distance of 360 km at
1:00 pm. After taking half-an-hour rest, he again
leaves Chennai and reaches Hyderabad at 9:00 pm
Find the decrease in his speed while coming back
to Hyderabad, if he maintains uniform speed.
​

Answer 1

Answer: 6.4 km/h can be the answer

Step-by-step explanation:

From 7 am to 1 pm

Time taken = 6 hours

Speed will be 360/6=

60 km / h

Back after half an hour

Speed will be 360/7.5 = 53.6 km /h

Difference will be 6.4 km/h

Answer 2

Distance from Hyderabad to Chennai

=360km

Time taken= 6hrs

Speed= distance/time

=360/6

=60km/ hrs

Distance from Chennai to Hyderabad

=360km

Time taken=7.5hrs (7hrs 30min)

Speed= distance/time

=360/7.5

=48 km/hr

Decrease in speed =

60-48= 12km/hr Ans