Question

the cost of fencing a circular field at the rate of rs24 per metre is rs 5280. the field is to be ploughed at the rate of rs 0.50per m square . Find the cost of ploughing the field ( take pl 22/7).

Answer 1

Answer:

At a blood donation camp organized to celebrate the World Diabetes Day, a total 270 volunteers had queued up for blood donation. The number of people with blood group ‘O’ was thrice the number with blood group A. The number of volunteers with blood group ‘AB’ was twice the number with blood group A and those with blood group B was 20 more than 4 times with blood group A. Find the number of volunteers of each blood group. What is your view on this act of donating blood.