Question

the slamt height and base diameter of a tomb ​

Answer 1

he slant height and base diameter of a conical tomb are 25 m and 14 m respectively. Find the cost of white-washing its curved surface at the rate of Rs 210 per 100 m2. Curved surface area of tomb = rl Given slant height = l = 25m Radius = 14/2 = 7m Curved surface area of tomb = rl = (22/7 7 25) m2 = (22 1 25) m2 = 550m2 Cost of whitewashing 100 m2 area = Rs 210 Cost of whitewashing 1 m2 area = Rs 1/100 210 Cost of whitewashing 550 m2 area = Rs 1/100 210 550 = Rs 1155

Answer 2

Answer:

Curved surface area of a cone =πrl, where r is the radius of the cone and l is the slant height.

Radius of the tomb =

2

Diameter

=7m

Hence, CSA of this conical tomb , =

7

22

×7×25=550 sq. m.

Cost of white washing the tomb at Rs. 210 per 100m

2

=

100

210

×550= Rs. 1155