A shopkeeper bought tea at N2.40 per kg; and mixed it with twice as much tea at N2 per kg. He sold the mixure at N2.60 per kg and gained N5.60 on the...
A water tank A contains 3 times as much water as another water tank B. When 25 liters are poured from tank A into B, there is now twice as much water...
A transformer has 500 turns in the primary coil and 300 turns in the secondary coil. If the primary is connected to 220 V mains, what voltage will be...
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