Question

The craft society of a city held a competition of making cylindrical flower vase using cardboard.The diameter of a flower vase is 42cm and height is 14cm.30 students of different Vidhyalaya participate in the competition.For this situation answer the following question:
(A) How much cardboard is required to be brought by the craft society for this competition.
(B) What is the amount spent by the craft society to purchase the cardboard at the rate of Rs.20 per 100 cm square.

Answer 1

Answer:

d=42cm

r=21 cm

h=14 cm

for 1 cardboard =2πrh+πr2

2*22/7*21*14+22/7*21*21

44*28+66*21

1232+1386

1618 cm2

for 30 cardboard =1618*30 = 48540 cm2

for 100 cm2 = Rs 20

total cost = 48540/100*20 = Rs 9708

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