RRB NTPC Question Paper 2016 Tier-1 (Set-1) with Answer Key

RRB NTPC Question Paper 2016 Tier-1 (Set-1) with Answer Key

86) A tank can be filled by two taps X and Y in 5 hrs and 10 hrs respectively while another tap Z empties the tank in 20 hrs. In how many hours can the tank be filled if all 3 taps are kept open?

Answer is:

4

87) Anil bought 100 eggs at Rs. 5 per egg. He sold 25 eggs at 10% profit, another 25 eggs at 25% loss and the balance 50 eggs at 20% profit. Find the overall profit or loss percent Anil made?

Answer is:

6.25% profit