The speed of a car is given as 80 km - hr- Select the correct conversion factors-A- Multiply by 5-18 to convert it into m - secB- Multiply by 18-5 to convert it into m - sec 50C- Multiply by 50-3 to convert it into m - minD- Divide 60 to convert it into m - min

The correct options are A Multiply by 5/18 to convert it into m/sec C Multiply by 50/3 to convert it into m/min 80 km/hr = 80 ×1000/3600 m/sec = 80 ×5/18 m/sec ...

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Standard VII

Mathematics

Units of Speed

The speed of ...

Question

The speed of a car is given as 80 km/hr. Select the correct conversion factors.

Multiply by $\frac{5}{18}$ to convert it into m/sec

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Multiply by $\frac{18}{5}$ to convert it into m/sec

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Multiply by $\frac{50}{3}$ to convert it into m/min

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Divide 60 to convert it into m/min

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Solution

The correct options are
A
Multiply by $\frac{5}{18}$ to convert it into m/sec

C
Multiply by $\frac{50}{3}$ to convert it into m/min

80 km/hr = $80 \times \frac{1000}{3600}$ m/sec = $80 \times \frac{5}{18}$ m/sec

Also

80 km/hr = $80 \times \frac{1000}{60}$ m/min = $80 \times \frac{50}{3}$ m/min

So, options A and C are correct.

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The speed of a car is given as 80 km/hr. Select the correct conversion factors.

The correct options are A Multiply by 518 to convert it into m/sec C Multiply by 503 to convert it into m/min 80 km/hr = 80×10003600 m/sec = 80×518 m/sec Also 80 km/hr = 80×100060 m/min = 80×503 m/min So, options A and C are correct.