Question:A house-owner was having his house painted. He was advised that he would require `25` kg of paint. Allowing for `15%` wastage and assuming that the paint is available in `2kg` cans, what would be the cost of paint purchased, if one can cost Rs, `16` ? 

A `Rs. 240` 
B `Rs. 180` 
C `Rs. 160` 
D `Rs. 360` 

+ Answer
A 

+ Explanation
`15% of x + 25`

`= x ⇒ x - 15/(100) x`

`= 25 or (17x)/(20 = 25`

`or x = (25 xx 20)/17`

`= 29.41 or 30 kg.`

So, he must purchase `15` cans. 

Total cost`= Rs. (16 xx 15)`

`= Rs. 240`

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Irin Moni

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