The dome of a building is hemispherical in shape,having radius of 7 m. It has to be painted at Rs.5 per sq. m. Find the total cost of painting the dome.

Rs.720

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Rs.1720

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Rs.1400

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Rs.1540

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D
Rs.1540

Cost of painting the dome = Curved surface area of hemisphere × 5

= 5 × 2 $π r^{2}$ = 5 x 308 = Rs.1540

Suggest Corrections

Similar questions

Q. The hemispherical dome of a building needs to be painted. If the circumference of the base of dome is

17.6

, find the cost of painting it, given the cost of painting is

R s . 5

per

100 c m^{2}

The circumference of a hemispherical dome is 44 m. Calculate the cost of painting at Rs 20 per sq. m.

The dome of a building is in the form of a hemisphere. Its radius is 63 dm. Find the cost of painting it at the rate of Rs. 2 per sq. m.

Q. The inner curved surface area of a hemispherical dome of a building needs to be painted. If the circumference of the base is

17.6 m

, find the cost of painting it at the rate of Rs.

5

per sq.m

A hemi- spherical dome of a building needs to be painted. If the circumference of the base of the dome is 17.6 m, find the cost of painting it, given the cost of painting is Rs. 5 per $100 c m^{2} .$

Join BYJU'S Learning Program

The dome of a building is hemispherical in shape,having radius of 7 m. It has to be painted at Rs.5 per sq. m. Find the total cost of painting the dome.

The correct option is D Rs.1540 Cost of painting the dome = Curved surface area of hemisphere × 5 = 5 × 2 πr2= 5 x 308 = Rs.1540

The correct option is D
Rs.1540

Cost of painting the dome = Curved surface area of hemisphere × 5

= 5 × 2 $π r^{2}$ = 5 x 308 = Rs.1540