There are 100 students in a blind school. Mr.and Mrs. Ramesh wished to serve them milk. They served the milk in a hemispherical
bowl with daimeter 21cm made up of ecofreindly material to each student. (A) How many litres of milk was served by them to all 100 students. (B) What was the total cost of milk if the rate of the milk was Rs.10 per litre ? (C) Write the value shown by them.