Question

A train after covering
4/11 port of distance
reduced its speed by 18.33% and reaches
certain destination 77 minutes late. Find the
time taken by train to cover the complete
distance after it reduced its speed ?​

Answer 1

Answer:

Correct option is

D

Original speed = 30 km/hr, Length of the journey = 120km

Let the speed of the train=x km\hr

Length of the journey=y km.

Time taken

According to the first condition.

Speed for the first 30 km = x km/hr

speed for the remaining (y−30) km =

5

4

km/hr

∴ time taken to cover 30 km =

x

30

time taken to cover (y−30)=

5

4x

y−30

=

4x

5

(y−30)

According to the pro

⇒120+5y−150=4y+3x

⇒y−3x=30⇔3x−y=−30 ....(1)

According to the second condition.

Speed for the first 48 km = x km/hr

speed for the remaining (y−48) km =

Let the speed of the train=30 km/hr

Length of the journey=120 km

Step-by-step explanation:

answer is 120 km