Problems on Direct and Inverse proportion

Problems on Direct and Inverse proportion

#### If 15 workers can build a wall in 42 days, how long would it take for 21 workers to build the same wall? 1. [ ] 28 days 2. [x] 30 days 3. [ ] 24 days 4. [ ] 21 days #### If 18 workers can build a wall in 45 days, how many workers are needed to build the same wall in 36 days? 1. [x] 23 workers 2. [ ] 27 workers 3. [ ] 36 workers 4. [ ] 45 workers #### If 15 workers can build a wall in 50 days, how long would it take for 25 workers to build the same wall? 1. [ ] 32 days 2. [x] 30 days 3. [ ] 20 days 4. [ ] 16 days #### If 20 taps can fill a tank in 30 minutes, how long would it take for 15 taps to fill the same tank? 1. [x] 40 minutes 2. [ ] 45 minutes 3. [ ] 50 minutes 4. [ ] 60 minutes #### If 16 workers can build a wall in 48 days, how many workers are needed to build the same wall in 36 days? 1. [x] 22 workers 2. [ ] 32 workers 3. [ ] 36 workers 4. [ ] 48 workers