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The adjoining figure shows the cross-section of a railway tunnel.
The radius of the tunnel is 3.5m (i.e., OA=3.5m) and ∠AOB=90o. Calculate :
i. the height of the tunnel.
ii. the perimeter of its cross section, including base.
iii. the area of the cross-section
iv. the internal surface area of the tunnel, excluding base, if its length is 50m.
(Ans: (i) 5.97m (ii) 21.44m (iii) 28.875 sq m (iv) 825 sq m)
To find out the perimeter of a triangular region, what formula would you use? The perimeter of a triangle is length of surface a plus length of side b plus length of side c.
sin45
suresh invested rs.1080 in shares of face value rs.50 at rs.54.After receiving dividend on them at 8% he sold them at 52.In each of the transaction he paid 2 % brokerage.Hpw much d
-2+-9
principal=2000 rate=5% time=2 years find compound interest
In a class,there are 174 students in form three,86 students play table tennis,84 play football and 94 play volleyball,30 play table tennis and volleyball,34 play volleyball and foo
proof of chebychevs lemma
1,5,14,30,55 find the next three numbers and the rule
Find out the general formula for the tangent vector and unit tangent vector to the curve specified by r → (t) = t 2 i → + 2 sin t j → + 2 cos t k → . Solution First,
can you help me
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