Page 53 - SM Class 5 Inner.cdr

Word Problems
1 1
Example 9 : Alka walks 2 km distance in one hour. How many kilometres can she walk in 8 hours?
2 4
1
Solution : Distance walk in 1 hour = 2 km.
2
1 1 1
Distance can be walked in 8 hours = 8 ´ 2 km
4 4 2

´
33 5 33 5
= ´ =
´
4 2 4 2
165 5
= = 20 km
8 8

1 1
Example 10 : The cost of 5 kg of sugar is ` 95 . Find the cost of 1 kg sugar.
3 4
1 1
Solution : The cost of 5 kg sugar = ` 95
3 4
1 1
Cost of 1 kg sugar = 95 ¸ 5
4 3
+
´
95 4 + 1 5 3 1
´
= ¸
4 3
381 16
= ¸
4 3
381 3
= ´
4 16
1143
=
64
55
= ` 17
64
55
So the cost of 1 kg sugar is ` 17 .
64

3 3 2
Ex am ples 11 : Ranjan cov ered a dis tance of 20 km by bus, 12 km by train and 3 km
5 7 5
by car. How much to tal dis tance did he cover?
3 3 2
Solution : Total distance covered = 20 + 12 + 3
5 7 5
æ 3 3 2 ö
= (20 + 12 + )3 + ç + + ÷
è 5 7 5 ø
æ 3 ´ 7 + 3 ´ 5 2 7
+ ´ ö
= 35 + ç ÷
è 35 ø
21 + 15 + 14
= 35 +
35

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