Question

solid wooden cone with diameter 14cm and vertical length 24cm is vertically cut into two equal halves. one half is to be covered by paper at rate of rs 7per sq. cm find total cost of paper required?​

Answer 1

Answer:

TSA of cone = πr(l+r)

22/7 × 7 (25+7)

22(32)

TSA of cone = 704 cm^2

1/2 of TSA of cone = 1/2× 704

= 352cm^2

Cost /cm^2 = Rs 7

Cost /352cm^2 = 352×7

Cost /352 cm^2 = Rs 2464