A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. if the outer side of each of the cones is to be painted and the cost of painting is ₹12 per  m2, what will be the cost of painting all these cones?

# A bus stop is barricaded from the remaining part of the road, by using 50 hollow cones made of recycled cardboard. Each cone has a base diameter of 40 cm and height 1 m. if the outer side of each of the cones is to be painted and the cost of painting is ₹12 per , what will be the cost of painting all these cones?

1. A
Rs.$354.84$
2. B
$\mathit{Rs}.394.84$
3. C
Rs.$384.34$
4. D
None of these

Fill Out the Form for Expert Academic Guidance!l

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)

### Solution:

Given :
Slant height($l$) is,
${l}^{2}={h}^{2}+{r}^{2}$
$⇒$   ${l}^{2}={1}^{2}+{0.2}^{2}$
Curved surface area of a cone
Curved surface area of 50 cones
Cost of painting
Hence, the cost of painting is Rs. $384.34$

## Related content

 Area of Square Area of Isosceles Triangle Pythagoras Theorem Triangle Formula Perimeter of Triangle Formula Area Formulae Volume of Cone Formula Matrices and Determinants_mathematics Critical Points Solved Examples Type of relations_mathematics

+91

Live ClassesBooksTest SeriesSelf Learning

Verify OTP Code (required)