Question

8. An aeroplane takes 20 hours to complete a journey flying at an average speed of
780 km/hr. Find the time taken for the same journey if it flies at average speed of
800 km/hr.

The answer is 19.5 hours...
Solve the question according to the answer... ​

Answer 1

Answer:

Given:- time(t) = 20 hours

speed(s) = 780 km/hr.

distance(d) = ?

we know that ; distance = speed × time

( d = s × t )

d = 780 km/hr. × 20 hours = 15600 km/hr.

so, Distance (d) = 15600 km.

In 2nd condition;

Distance (d) = 15600 km.

Time(t) =

Speed (s) = 800 km/hr.

we know that;

t = d/s.

t = 15600/800

t = 19.5 hours.

So, Time taken 19.5 hours.