IBPS SO Prelims Exam Model Paper 2

GIVEN :
Ratio of iron and copper in alloy P = 4 : 13
Ratio of iron and copper in alloy Q= 6 : 11
CONCEPT :
Mixture Problems
CALCULATION :
Quantity of iron in 15 kg alloy P = 15 ×

4

17

=

60

17

kg.
Quantity of copper in 15 kg alloy P = 15 ×

13

17

=

195

17

kg.
Quantity of iron in 20 kg alloy Q = 20 ×

6

17

=

120

17

kg.
Quantity of copper in 20 kg alloy Q = 20 ×

11

17

=

220

17

kg.
Quantity of iron in new alloy =

60

17

+

120

17

=

180

17

kg.
Quantity of copper in new alloy =

195

17

+

220

17

=

415

17

kg.
∴ The ratio of iron and copper in new alloy = 180 : 415 = 36 : 83