Page 110 - Start Up Mathematics_5

Word Problems on Multiplication and Division

Example 15: Hariti bought a set of 12 notebooks for her new class. If the cost of one
notebook is ` 15.50, how much did Hariti pay for the whole set?
Solution: Cost of one notebook = ` 15.50

Cost of 12 notebooks = ` 15.50 × 12 = ` 186.00

1 1
1 5 5 0

× 1 2
3 1 0 0
+ 1 5 5 0 0
1 8 6 0 0

Thus, Hariti paid ` 186.00 for a set of 12 notebooks.
Example 16: Maanav goes to the market to buy one dozen eggs. If the cost of one egg is
` 2.50, how much money does Maanav need to buy eggs?

Solution: 1 dozen eggs = 12 eggs

Cost of 1 egg = ` 2.50
Cost of 12 eggs = ` 2.50 × 12 = ` 30.00

1
2 5 0

× 1 2

1 5 0 0
+ 2 5 0 0
3 0 0 0

Thus, Maanav needs ` 30.00 for 12 eggs.

Example 17: To reach Agra from Delhi, a train covers 132.72 km in 4 hours. How much
distance does it cover in 1 hour?

Solution: Distance covered in 4 hours = 132.72 km 3 3 . 1 8
Distance covered in 1 hour = 132.72 ÷ 4 = 33.18 km 4 1 3 2 . 7 2
– 1 2 ↓
Thus, the distance covered by the train in 1 hour is 33.18 km. 1 2

– 1 2
0 7
– 4
3 2
– 3 2
0

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