Question

5 dry raisins were placed in each of the two beakers containing 50 mL of water. After four hours, the raisins were taken out and wiped. For calculating the percentage of water absorbed by raisins, the raisins should have been weighed
(1) only before placing in water
(2) only after four hours of their being in water
(3) both before and after placing in water
(4) before and at intervals of every hours

Answer 1

Answer:

2nd option is the correct one

Answer 2

Answer is Option (C)

Explanation:

The Raisins should be weighed both before and after placing them in water.

• This is because the percentage of water absorbed = $\frac {Weight\ of\ Water\ Absorbed\ by\ Raisins}{Weight\ of\ Raisins\ Before\ Absorbing\ Water} \times 100$