1. The ratio of parrots to monkeys is 2:5. If there are 36 monkeys, then the number of parrots can be found by setting up a proportion: 2/5 = x/36. Solving for x gives x = (2 * 36) / 5 = 14.4. Since the number of parrots must be a whole number, there are 14 parrots.
2. The vine is 21 meters long and the monkey climbs 3 meters in 4 seconds. The time to climb the entire vine is (21 meters / 3 meters) * 4 seconds = 7 * 4 = 28 seconds.
3. The monkey eats 120 bananas in 3 days. To find the number of bananas eaten per day, divide the total number of bananas by the number of days: 120 / 3 = 40 bananas per day.
4. The ratio of spotted butterflies to total butterflies is 3:10. If there are 60 butterflies in total, the number of spotted butterflies can be found by setting up a proportion: 3/10 = x/60. Solving for x gives x = (3 * 60) / 10 = 18 spotted butterflies.
5. The crocodile takes 15 minutes to cross a river that is 24 meters wide. To find how long it would take the sloth to travel 24 meters at the same speed, we need to know the sloth's speed. However, the sloth's speed is not given. Therefore, we cannot determine the time it would take the sloth to cross the river.
6. The ratio of poisonous snakes to non-poisonous snakes is 1:8. If there are 63 non-poisonous snakes, then the number of poisonous snakes can be found by setting up a proportion: 1/8 = x/63. Solving for x gives x = (1 * 63) / 8 = 7.875. Since the number of poisonous snakes must be a whole number, there are 8 poisonous snakes.
7. The monkey can jump 4 meters with each leap. To reach the top of a 20-meter-tall tree, the number of leaps needed is 20 meters / 4 meters = 5 leaps.
8. The ratio of water flow from the first waterfall to the second waterfall is 3:7. If the first waterfall has a flow rate of 18 liters per second, then the flow rate of the second waterfall can be found by setting up a proportion: 3/7 = 18/x. Solving for x gives x = (7 * 18) / 3 = 42 liters per second.
9. The ratio of tigers to lions to leopards is 5:3:4. If there are 64 tigers, then the total number of animals can be found by setting up a proportion: 5/12 = 64/x. Solving for x gives x = (12 * 64) / 5 = 153.6. Since the number of animals must be a whole number, there are 154 animals in total.
Parent Tip: Review the logic above to help your child master the concept of ratio and rate problems worksheet.
