Q. 7.     Find the ratio of the following:

            (a) 30 minutes to1.5 hours

            (b) 40\; cm to 1.5 \; cm

            (c) 55 paise to Rs.1

            (d) 500\; mL to 2\; litres

Answers (2)
P Pankaj Sanodiya

  (a) 30 minutes to1.5 hours

As we know,

1 \:hour = 60\:minutes

So,

1.5 \:hour =1.5\times 60=90\:minutes

Hence The ratio of  30 minutes to1.5 hours:

\frac{30}{90}=\frac{3}{9}=\frac{1}{3}=1:3

(b) 40\; cm to 1.5 \; cm

  As we know,

1 \:m= 100\:cm

So,

1.5 \:cm=1.5\times 100=150\:cm

Hence The ratio of  40\; cm to 1.5 \; cm

\frac{40}{150}=\frac{4}{15}=4:15.

(c) 55 paise to Rs.1

            

(d) 500\; mL to 2\; litres

P Pankaj Sanodiya

  (a) 30 minutes to1.5 hours

As we know,

1 \:hour = 60\:minutes

So,

1.5 \:hour =1.5\times 60=90\:minutes

Hence the ratio of  30 minutes to1.5 hours:

\frac{30}{90}=\frac{3}{9}=\frac{1}{3}=1:3

(b) 40\; cm to 1.5m

  As we know,

1 \:m= 100\:cm

So,

1.5 \:m=1.5\times 100=150\:cm

Hence the ratio of  40\; cm to 1.5 \:m=1.5\times 100=150\:m

\frac{40}{150}=\frac{4}{15}=4:15.

(c) 55 paise to Rs.1

  As we know,

1 \:rupee= 100\:paise

Hence the ratio of  55 paise to Rs.1

\frac{55}{100}=\frac{11}{20}=11:20

(d) 500\; mL to 2\; litres

As we know,

1 \:litre= 1000\:mL

So

2 \:litre= 2\times1000=2000\:mL

Hence the ratio of  500\; mL to 2\; litres:

 \frac{500}{2000}=\frac{1}{4}=1:4

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