The water in a burette rises by a level of 16.1 cm when 10 identical ball bearings are dropped into it. What is the initial reading if final, reading is 36.3 cm? (A) 16 cm (B) 10.1 cm (C) 20.2 cm (D) 30 cm 3
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Correct answer is option c
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Given: 10 identical ball bearings were dropped in a burette.
Length of rising in water level in burette = 16.1 cm
The final reading in burette = 36.3 cm
To Find: Initial reading in the burette.
Solution:
We know that the water level became 36.3 cm after the rise of the water.
∴ we need to subtract the length of rising in water to find the initial reading.
∴ Initial reading = Final reading - Rise in water
= (36.3 - 16.1) cm
= 20.2 cm
Answer: The initial reading is option c) 20.2 cm.
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