1)A container has 5L 750ml of water, how many bottles each 50 ml capacity can be filled by this.
2)A student multipled 52 by 10101 instead of multiplying by 20202, by how much the answer will be the lesser than the correct answer.                                                          3)A cost of 840 boxes is ₹1680, find the cost of 90 pens if each box contain 40 pens.