Question

12 metre of a uniform red iron rod which weight 42 kg what will be the weight of 6 dm of same rod.​

Answer 1

Answer:

21 kg

Step-by-step explanation:

42=12m

1m=42/12

1m=3.5kg

so 6m=3.5*6

6m=21kg

Answer 2

Answer:

2.1 kg

Step-by-step explanation:

Weight of 12m long iron rod = 42kg

1m = 10dm ⇒ 12m = 120dm

Weight of 120dm of iron rod = 42kg

Weight of 1dm of iron rod = $\frac{42}{120}$ = $\frac{7}{20}$kg = 0.35kg

Therefore, weight of 6dm of iron rod = 0.35 x 6 = 2.1 kg

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