Fill in the blanks.

A pen costs Rs12. Find the cost of 3 such pens.Rs
Jimmy saves Rs15 on Monday and twice as much on Tuesday. How much money does he save in all?Rs
A lorry can carry 2000 bricks in 5 trips. How many trips will it take for the lorry to carry 1200 bricks? trips
Three water melons cost Rs105. How much will Azad pay for 5 water melons?Rs
Allan buys 5kg of potatoes for Rs42. How much will Dev pay for 15kg of the same article?Rs
A packet of peanuts costs Rs2.50 and a can of juice costs 5 times as much. Find the cost of 5 packets of peanuts and 3 cans of juice.Rs