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A tree is broken by wind, its upper part...

A tree is broken by wind, its upper part touches the ground at a point 10 metres from the foot of the tree and makes an angle of ` 45^(@) ` with the ground . The entire length of the tree is

A

15 metres

B

20 metres

C

` 10 ( 1+ sqrt2) ` metres

D

` 10 ( 1+ (sqrt3)/(2))` metres

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The correct Answer is:
C
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AAKASH SERIES-PROPERTIES OF TRIANGLES-EXERCISE - 1
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  2. IF in a Delta ABC, r3=r1+r2+r, then angle A+ angle B=

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  3. A tree is broken by wind, its upper part touches the ground at a point...

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  4. The angle of elevation of an object from a point P on the level ground...

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  5. The shadow of the tower standing on a level ground is found to be 60 m...

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  6. A person standing on the bank of a river observes that the angle subte...

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  8. If a flag staff of 6 mt high placed on the top of a tower throws a sha...

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  9. A sphere of radius 'a' subtends an angle 60^(@) at a point P. Then the...

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  11. Two ships leave a port at the same time . One goes 24km per hour in th...

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  13. In a triangle ABC if (cos A)/a=(cos B)/b= (cos C)/c, then Delta ABC is

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  14. In Delta ABC, if sin C=(sin A)/(2 cos B) then the triangle is

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  15. The angle of elevation of the sun when length of the shadow of a pole ...

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  16. The elevation of an object on a hill is observed from a certain point...

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  17. A flag staff of length 10 mt stands on a tower if from a point on the ...

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  18. The shadow of a tower standing on a level plane is found to be 50 mt l...

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  19. A tree stands vertically on the slant of the hills From a point A on t...

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  20. If Delta ABC is such that angle A = 90 ^(@) , angle B ne angle C " ...

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