"After 30 kg of water had been evaporated from a solution of salt and water, which had
Channel: Doubtnut
Date: 2020-04-12

"After 30 kg of water
 had been evaporated from a solution of salt and water, which had 15% salt, remaining
 solution had 20% salt. The weight of the original solution was 
`80\ kg`
b. `120\ kg`
c. `90\ kg`
d. `135\ kg`"