A man gets an appointment with two options Either he can accept ₹ 45 per day for 30 days or ₹ 30 on the first day with an increase of ₹ 1.50 per day for 30 days. Which of the options will be beneficial to him ? How much will he gain by that choice ?

Ekta earns Rs.1500 in 10 days.How much she will earn in 30 days?

In a hostel of 50 girls, there are food provision for 40 days.If 30 more girls join the hostel,how long will these provisions last ?

A tourist with 300, calculating that he could spend $ x everyday on his holidays. He spent $ {x + 10) per day and had nothing left 5 days before the end of his holidays. Calculate 'x'.

A contract on construction job specifies a penalty for delay of completion beyond a certain date as follows : $200 for the first day, $250 for the second day, $ 300 for the third day, etc., the penalty for each succeeding day being $50 more than for the preceding day, How much money the contractor has to pay as penalty, if he has delayed the work by 30 days ?

A village, having a population of 4000, requires 150 litres of water per head per day. It has a tank measuring 20 m by 15 m by 6 m. For how many days will the water of this tank last ?