We have to find the number of significant figures in the product of 1.6 cm and 2.4 cm.
Let us first find the product of 1.6 cm and 2.4 cm.
= 3.84 square cm.
Now, we have to determine the number of significant figures in 3.84
The significant digits of a number are the digits have meaning or they contribute to the value of the number. All non-zero digits are significant , any zeros between significant digits are also significant figures and the trailing zeros to the right of a decimal point are significant figures.
Therefore, in 3.84, there are 3 significant figures in this number.
So, there are 3 significant figures in the product of 1.6 cm and 2.4 cm.