Question

the weight of 3 balls of wool is 20g. How many balls of wool weight 1 kg​

Answer 1

Answer:

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The weight of 3 balls of wool is 20g. How many balls of wool weight 1 kg ?

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Number of balls of wool weighing 1 kg.

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No. of balls of wool in 20 g = 3

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Unitary Method

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We know that,

${ \sf{1 kg = 1000 g}}$

Now,

A/q

No. of balls of wool weighing 20g = 3 balls.

∴ No. of balls of wool weighing 1 g = ${ \sf{\frac{3}{20} }}$

∴ No. of balls of wool weighing 1000g (1kg)

${ \sf{ \implies \frac{3}{ \cancel{{20} }}\times { \cancel{1000 }} = 3 \times 50 = 150 balls }}$

${ \boxed{ \sf{ \red{∴ No. \: of \: balls \: in \: 1kg = 150}}}}$

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Answer 2

Answer:

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No. of balls of wool weighing 1 kg is 150.

Hope it helps...