When 100 g of a liquid A at 100°C is added to 50 g of a liquid B at temperature 75°C, the temperature of the mixture becomes 90°C. The temperature of the mixture, if 100 g of liquid A at 100°C is added to 50 g of liquid B at 50°C, will be :
a.
80° C
b.
60°C
c.
70°C
d.
85°C
a.
80° C
b.
60°C
c.
70°C
d.
85°C
Question ID - 50384 | SaraNextGen Top Answer When 100 g of a liquid A at 100°C is added to 50 g of a liquid B at temperature 75°C, the temperature of the mixture becomes 90°C. The temperature of the mixture, if 100 g of liquid A at 100°C is added to 50 g of liquid B at 50°C, will be :
a.
80° C
b.
60°C
c.
70°C
d.
85°C
When 100 g of a liquid A at 100°C is added to 50 g of a liquid B at temperature 75°C, the temperature of the mixture becomes 90°C. The temperature of the mixture, if 100 g of liquid A at 100°C is added to 50 g of liquid B at 50°C, will be :
|
a. |
80° C |
b. |
60°C |
|
c. |
70°C |
d. |
85°C |
1 Answer
127 votes
Answer Key / Explanation : (a) -
100 × SA × [100 − 90] = 50 × SB × (90 − 75)
2SA = 1.5 SB
SA = 
SB
Now, 100 × SA × [100 − T] = 50 × SB (T − 50)
2 × 
(100 − T ) = ( T − 50 )
300 − 3T = 2T − 100
400 = 5T
T = 80
127 votes
Answer Link
127