five problems based on four fundamental operations of rational number
Answers
1. From a rope 11 m long, two pieces of lengths 13/5 m and 33/10 m are cut off. What is the length of the remaining rope?
2. A drum full of rice weighs 241/6 kg. If the empty drum weighs 55/4 kg, find the weight of rice in the drum.
3. A basket contains three types of fruits weighing 58/3 kg in all. If 73/9 kg of these be apples, 19/6 kg be oranges and the rest pears. What is the weight of the pears in the basket?
4. On one day a rickshaw puller earned $80. Out of his earnings he spent $68/5 on tea and snacks, $51/2 on food and $22/5 on repairs of the rickshaw. How much did he save on that day?
5. Find the cost of 17/5 meters of cloth at $147/4 per meter.
6. A car is moving at an average speed of 202/5 km/hr. How much distance will it cover in 15/2 hours?
7. Find the area of a rectangular park which is 183/5 m long and 50/3 m broad.
8. Find the area of a square plot of land whose each side measures 17/2 meters.
9. One liter of petrol costs $187/4. What is the cost of 35 liters of petrol?
10. An airplane covers 1020 km in an hour. How much distance will it cover in 25/6 hours?
11. The cost of 7/2 meters of cloth is $231/4. What is the cost of one meter of cloth?
12. A cord of length 143/2 m has been cut into 26 pieces of equal length. What is the length of each piece?
13. The area of a room is 261/4 m2. If its breadth is 87/16 meters, what is its length?
14. The product of two rational numbers is 48/5. If one of the rational number is 66/7, find the other rational number.
15. Rita had $300. She spent 1/3 of her money on notebooks and 1/4 of the remainder on stationery items. How much money is left with her?
16. Adrian earns $16000 per month. He spends 1/4 of his income on food; 3/10 of the remainder on house rent and 5/21 of the remainder on the education of children. How much money?