an aeroplane takes 3 hour to cover a distance of 3600 kilometre and other aeroplane travel at a speed which is 100 kilometre per hour less than first aeroplane how long will the second aeroplane take to cover the same
Answer is 3hr 16 min
please answer fast with full explanation ..
Answers
Answer:
3hr 16 min
Step-by-step explanation:
Speed(1st plane) = distance/time
= 3600/3 = 1200 km/hr
Speed(2nd plane) = 100 less than 1200
= 1100 km/hr
For the 2nd plane,
1100 = distance/time = 3600/time
⇒ time = 3600/1100
⇒ time = (36/11) hr = (33 + 3)/11 hr
= 3hr + (3/11) hr
= 3hr + (3/11)*60 min
= 3hr + 16.36 min
= 3hr + 16 min + 0.36 min
Ignoring the smallest term,
time taken = 3hr 16 min
Given :-
An aero plane takes 3 hour to cover a distance of 3600 kilo meter and other aero plane travel at a speed which is 100 kilo meter per hour less than first aero plane
To Find :-
How long will the second aero plane take to cover the same
Solution :-
At first speed = Distance/Time
Speed(1) = 3600/3
Speed(1) = 1200 km/hrs.
Speed(2) = Speed 1 - 100
Speed(2) = 1200 -100
Speed (2) = 1100 km/hrs.
Since we have to find time
Distance = Length
3600/time = 1100
time = 3600/1100
time = 36/11 or (33 + 3)/11 hr
Time = 3hrs. + 3/11hrs.
Time = 3hr + 16.36 min
Time = 3.16 hrs.