Question

My brother is a college student. Last week two of his friends borrowed $₹ 225$ and $₹ 413$ from him to buy books. Today they returned him the money. Let me find if my brother will be able to buy a book for $₹ 610$ , with the money he got.

Exact Price	Expected Price(Rounded to nearest multiple of $10$ )
$₹ 230$
$₹ 413$
	$₹ 640$

Exact Price	Expected Price(Rounded to nearest multiple of $10$ )
$₹ 225$
$₹ 413$
	$₹ 640$

Accepted Answer

Exact Price Expected Price(Rounded to nearest multiple of $10$ )

$₹ 610$

$₹ 413$

$₹ 640$

Now, we shall convert $₹ 413$ to their nearest whole number which is a multiple of $10$ .

We know that, the multiple of $10$ above $₹ 225$ is $₹ 230$ and the multiple of $10$ below $₹ 225$ is $₹ 220$ .

Also, in $₹ 225$ one's place is $5$ which is equal to $5$ . So we need to round up the whole number $₹ 225$ .

So, the nearest whole number which is a multiple of $10$ to $₹ 225$ is $₹ 230$ .

Now, we shall convert $₹ 413$ to their nearest whole number which is a multiple of $10$ .

We know that, the multiple of $10$ above $₹ 413$ is $₹ 420$ and the multiple of $10$ below $₹ 413$ is $₹ 410$ .

Also, in $₹ 413$ one's place is $3$ which is less than $5$ . So we need to round down the whole number $₹ 413$ .

So, the nearest whole number which is a multiple of $10$ to $₹ 413$ is $₹ 410$ .

Exact Price Expected Price(Rounded to nearest multiple of $10$ )

$₹ 225$ $₹ 230$

$₹ 413$ $₹ 410$

$₹ 638$ $₹ 640$

West Bengal Board Solutions for Chapter: Logical Approximation of Number, Exercise 8: Exercise 8

West Bengal Board Mathematics Solutions for Exercise - West Bengal Board Solutions for Chapter: Logical Approximation of Number, Exercise 8: Exercise 8

Questions from West Bengal Board Solutions for Chapter: Logical Approximation of Number, Exercise 8: Exercise 8 with Hints & Solutions

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