Question

Can someone plz help me solved this problem I need help plz help me! Will mark you as brainiest!

Answer 1

Answer:

260

20

Step-by-step explanation:

speed of plane= p

speed of wind =w

• (p+w)*3=840
• p+w=840/3=280

and

• (p-w)*3.5=840
• p-w= 840/3.5= 240

added up the 2 equations we get:

• 2p= 280+240
• p=260 mph

then

• w= 20 mph