Exercise 17.3 1 1 300 students can sit in 12 classrooms, how many rooms should be added to accomo 2. If the price of 4 dozen of pens is Rs. 576, how many pens can be bought in Rs. 2287 3 If a person can travel 18 km in 45 minutes, what time is needed to travel 30 km A truck can cover certain distance in 6 hours at the speed of 48 km per hour, if the speed of 4 truck is reduced to 36 km per hour, how much time will take for the truck to travel the same distance? if 20 persons are needed to complete a piece of work in 15 days, how many persons Shows be added to complete the same work in 12 days? If the price of 1 kg flour is Rs. 22, and the weight of 1 bread is 496 gm, what is the weight 1 bread if the price of 1 kg flour is Rs. 32? (Suppose the price of bread remains constant ) 12 workers required to do a piece of work in 14 days. If there are 21 workers, in how ma ays the work will be finished? there is food enough for 200 army for 30 days. How many army should be transferred ere to last food for 40 days?