To warn ships for underwater rocks- a lighthouse spreads a red coloured light over a sector of angle 80- to a distance of 16-5 km- The area of the sea over which the ships are warned is 190 km2 app-

The correct option is B TrueArea covered = nbsp; 80/360×22/7× (16.5)^2 nbsp;= nbsp; 2 × nbsp;22 nbsp;× 33 × 33/9 × 7 × 2 × 2 = nbsp; 1 ...

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Standard XII

Mathematics

Pythagoras Theorem

To warn ships...

Question

To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle $80^{\circ}$ to a distance of 16.5 km. The area of the sea over which the ships are warned is 190 $k m^{2}$ (app.).

True

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False

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Nither

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Solution

The correct option is B True
Area covered = $\frac{80}{360} \times \frac{22}{7} \times (16.5)^{2}$ = $\frac{2 \times 22 \times 33 \times 33}{9 \times 7 \times 2 \times 2}$
= $190.14 k m^{2} ≃ 190 k m^{2}$

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Similar questions

Q. To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle

80^{\circ}

to a distance of

16.5 k m

. Find the area of the sea over which the ships are warned. (Use

π = 3.14

)

To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle $80^{\circ}$ to a distance of 16.5 km. Find the area in $k m^{2}$ of the sea over which the ships are warned. (Use $π$ = 3.14)

Question 12
To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle $80^{\circ}$ to a distance of 16.5 km. Find the area of the sea over which the ships are warned.
$(U s e π = 3.14)$

Q. Question 12
To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle

80^{\circ}

to a distance of 16.5 km. Find the area of the sea over which the ships are warned.

(U s e π = 3.14)

To warn ships of underwater rocks, a light house spreads a red colored light over a sector of angle 80^o to a distance of 16.5 km. The area of the sea over which the ships are warned is

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To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle 80∘ to a distance of 16.5 km. The area of the sea over which the ships are warned is 190 km2 (app.).

The correct option is B TrueArea covered = 80360×227×(16.5)2 = 2×22×33×339×7×2×2= 190.14km2≃190km2

To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle $80^{\circ}$ to a distance of 16.5 km. The area of the sea over which the ships are warned is 190 $k m^{2}$ (app.).

The correct option is B True
Area covered = $\frac{80}{360} \times \frac{22}{7} \times (16.5)^{2}$ = $\frac{2 \times 22 \times 33 \times 33}{9 \times 7 \times 2 \times 2}$
= $190.14 k m^{2} ≃ 190 k m^{2}$