15 m - s -in km - hr A- 58 km - hrB- 54 km - hrC- 24 km - hrD- 100 km - hr

The correct option is B 54km/hr We know,1km/hr = 5/18 m/s ⇒ 1 m/s = 18/5 km/hr Now 15m/s = 15 × 1 m/s = 15 × 18/5km/hr ...

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Byju's Answer

Standard VII

Mathematics

Multiplication of Decimals

15 m / s =….i...

Question

15 m/s = ___.(in km/hr)

58km/hr

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54km/hr

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24km/hr

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100km/hr

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Solution

The correct option is B
54km/hr

We know,1km/hr = $\frac{5}{18}$ m/s

$\Rightarrow$ 1 m/s = $\frac{18}{5}$ km/hr

Now 15m/s = 15 $\times$ 1 m/s

= 15 $\times$ $\frac{18}{5}$ km/hr

= 3 $\times$ 18 km/hr

= 54km/hr

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15 m/s = ___.(in km/hr)

The correct option is B 54km/hr We know,1km/hr = 518 m/s ⇒ 1 m/s = 185 km/hr Now 15m/s = 15 × 1 m/s = 15 × 185km/hr = 3 × 18 km/hr = 54km/hr

The correct option is B
54km/hr

We know,1km/hr = $\frac{5}{18}$ m/s

$\Rightarrow$ 1 m/s = $\frac{18}{5}$ km/hr

Now 15m/s = 15 $\times$ 1 m/s

= 15 $\times$ $\frac{18}{5}$ km/hr

= 3 $\times$ 18 km/hr

= 54km/hr