Question

A plane flew 145km/h faster when it was flying with the wind than it would have flown with still air, if it’s speed with the wind was 970km/h, find the speed of the plane in still air

Answer 1

Answer:

Speed of plane in still air = 825 km/h

Step-by-step explanation:

Given:

Speed of plane with the wind is 145 km/h faster than what it would have with still air.

Speed of plane with wind = 970 km/h

To find speed of plane in still air.

Solution:

Let speed of plane in still air be = $x$ km/h

Thus speed of plane with wind would be given as = $(x+145)$ km/h

Speed of plane with wind is given =970 km/h

So, we have:

$x+145=970$

Solving for $x$.

Subtracting both sides by 145.

$x+145-145=970-145$

∴ $x=825$ km/h (Answer)

Thus, speed of plane in still air = 825 km/h