in dividing a certain number by 2 ,3 , 7 in succession the remainder are 1, 1, 6 respectively and the last quotient is 169. find the number
Answers
Answered by
3
Answer:
7 I think
Step-by-step explanation:
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Answered by
10
Let OB be the cliff of height 150 m and A be the position of the ship.
The angle of depression of the ship is 19
∘
30
′
Then ∠BAC=19
∘
30
′
In right angled triangle △AOB
tan19
∘
30
′
=
OA
OB
=
OA
150
⇒OA=
tan19
∘
30
′
150
⇒OA=150cot19
∘
30
′
⇒OA=150tan(90
∘
−19
∘
30
′
)
⇒OA=150tan70
∘
30
′
⇒OA=150×2.8239=423.59 m
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