Question

pls help me its urgent.​

Answer 1

Ratio of cycle to scooter is 1 : 2

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Answer 2

In this question, first we will have to check whether the elements involved in the required ratio has the same units.

a) Speeds of scooter and cycle, both have units "km per hour".

$hence \: ratio = \frac{speed \: of \: cycle}{speed \: of \: scooter}$

$\frac{15km /hr }{30km / hr} = \frac{ \cancel{15}}{ \cancel{ 30} } = \frac{1}{2}$

b)

5m and 10 km.

We know,

1km=1000m

∴10km=10000 m

$ratio = \frac{5m}{10000m} = \frac{ \cancel{5}}{ \cancel{10000} } = \frac{1}{2000}$

c)

50 paise and Rs. 5

We know,

Rs.1=100 paise

∴Rs.5=500 paise

$ratio = \frac{50paise}{500paise} = \frac{ \cancel{50} }{ \cancel{500} } = \frac{1}{10}$