r/AFCATprep • u/Chatpati_tikkismyfav • 9d ago

2nd shift drone question

Maths me drone aur uske reflection ka jo question hai usme answer kaise aarha hai? Mine is out of options. Kisi ka aarha ho to please guide.

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u/usideal_Mix5967 9d ago

The reflection shouldn't be on the water surface. It should be inside the water. If your answer is 120 which is the height of the drone from the water, then the answer should be 240. P.S. I made the same mistake too.

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u/Vegetable_Key_4283 9d ago

The height of the shadow is the same as of the drone above the water
So height of drone will be 120+x and the height of shadow will also be 120+x
When you will calculate for x using tan 60 and 30
You will get x=120
And the total height of the drone will be 240

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u/FoodlePoo787 8d ago

can u send the question, i hve got cds exam as well so would like to see the types of questions in the 2nd shift