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Explanation
- If 25 toys cost Rs 335.
- The cost of 55 toys can be figure out in this way.
Two given entities here are
- Quantity of toys
- Cost
- Cost increases as the quantity of toys increases.
- Cost decreases as the quantity of toys decreases.
This clearly indicates that there is direct relation.
Direct/Indirect relation tells how the equation will be written.
25/55 = 335/y
This equation gives the cost of 55 toys.
To Find
Cost of 55 toys = ?
Solution
Method I
Let suppose cost of 55 toys = y
Toys Cost
25 335
55 y
As, there is direct relation so;
25/55 = 335/y
25y = 55 x 335
25y = 18425
y = 18425/25
y = 737
Cost of 55 toys = Rs. 737 answer
Method II
Cost of 25 toys = 335
Cost of 1 toy = 335/25 = 13.4
Cost of 55 toys = 13.4 x 55 = 737
Cost of 55 toys = Rs. 737 answer
Conclusion
If 25 toys cost Rs 335, the cost of 55 toys will be Rs. 737.
V nice short questions of maths
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