Question

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Answer 1

Answer:

73.2 m/s

Step-by-step explanation:

Height of the plane is 1500 m .

In Δ ABC ,

tan 45 = AC / BC

= > 1 = 1500 / BC

= > BC = 1500 m

Now in Δ BED ,

tan 30 = ED / BD

= > 1/√3 = 1500 / BD

= > BD = 1500√3

Distance travelled in 15 s

= > 1500√3 - 500

= > 1500 ( √3 - 1 )

Speed = distance / time

= > 1500 ( √3 - 1 ) / 15

= > 100 ( √3 - 1 )

= > 100 ( 1.732 - 1 )

= > 100 × 0.732

= > 73.2 m/s

The speed is 73.2 m/s .

Answer 2

Hi
Here is the answer

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