Question

Cost of 1g of metal is ₹11.2. The cost of 2.6g of this metal is

• A. ₹13.8
• B. ₹29.12
• C. ₹30
• D. ₹22.12

Answer 1

The correct option is B ₹29.12

Cost of 1g of metal = $₹11.2$
Cost of 2.6g of metal $=₹11.2\times 2.6$
Steps to solve $11.2\times 2.6$
Step 1: Count the number of digits after decimal point for both the numbers and add them.i.e $1+1=2$

Step 2: Ignore a decimal point and perform the multiplication, as you would with whole numbers as follows

Step 3: Now place a decimal point back.
11.2 and 2.6 has 2 digit after decimal in total. So, move the decimal point 2 places to the left in the product

Hence, the cost of 2.6g of metal is ₹29.12.