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Question

Chirag spent ₹112 for 8 pens and 9 erasers. If the cost of one pen is ₹10, then estimate the cost of one eraser.

A
₹1
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B
₹2
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C
₹3
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D
₹4
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Solution

The correct option is C ₹3
₹112 spend by chirag can be rounded off to ₹110
one pen costs = ₹10
Cost of 8 pens = ₹10 x 8
= ₹80
Cost of 9 erasers = ₹110 - ₹80
= ₹30
9 erasers can be rounded off to 10 erasers
So the estimated cost of one eraser = ₹30 ÷ 10
= ₹3

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