Question

7 km 10 2. There are two routes from Junhao's house to the Bird Park. The first route is 19 22 km. Which route is longer? How much longer? 1 2 and the second route is 22​

Answer 1

Given : There are two routes from Junhao's house to the Bird Park.

The first route is 19 7/10 km.

the second route is 22​ 1/2 km

To Find :  Which route is longer?

How much longer?

Solution:

There are two routes

The first route is 19 7/10  km = 19.7  km

the second route is 22 1/2​ km = 22.5 km

22.5 > 19.7

Hence second route is longer

22.5 - 19.7  = 2.8  km

= 2  8/10

= 2 4/5 km

2.8  km of  2 4/5 km is longer

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Answer 2

Given:

two routes from Junhao's house to the Bird Park

first rout is  $19\frac{7}{10}$km

second route is  $22\frac{1}{2}$km

Find which route is longer=?

• so for first route :

         $19\frac{7}{10}\\\\=19+\frac{7}{10}\\\\=\frac{19\times10+7}{10}\\\\ =\frac{190+7}{10}\\\\ =\frac{197}{10} \\\\=19.7$

• For second route:

        $22\frac{1}{2}\\\\=22+\frac{1}{2}\\\\=\frac{22\times 2+1}{2}\\\\=\frac{44+1}{2}\\\\=\frac{45}{2}\\\\=22.5\ km$

• first route is 19.7 and the second route is 22.5

• It is clear that second route is longer as compare to first route

• 22.5 - 19.7 = 2.8 km

Hence the answer is second route is longer and 2.8km longer