3 years ago

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

Mathematics

1 answer:

olya-2409 [2.1K]3 years ago

7 0

Answer:

260

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

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