Radhika's junk shop's rate list is given below: ItemPrice per kgNewspaper₹6Brass₹280Iron₹23Copper₹402Aluminium₹120
What is the approximate price of 19 kg of copper?
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Solution
Price of 1 kg of copper = ₹402
Price of 19 kg copper = ₹402 x 19
₹402 can be rounded off as ₹400
and 19 kg can be rounded off as 20
Thus, appoximate total cost of 19 kg copper can be rounded off as: ₹400 x 20 = ₹8000