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प्रश्न
A postman can sort out 738 letters in 6 hours. How many letters can be sorted in 9 hours?
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उत्तर
Let the required number of letters be x.
| Number of letters | 738 | x |
| Required time to sort in hours | 6 | 9 |
They are in direct proportion.
`(x_1)/(y_1) = (x_2)/(y_2)`
`738/6 = x/9`
x = `(739 xx 9)/6`
x = 1107
In 9 hours 1107 letters can be sorted.
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संबंधित प्रश्न
In which of the following tables x and y vary directly?
(i)
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| b | 21 | 27 | 39 | 63 | 75 |
(ii)
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(iii)
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| b | 6 | 9 | 12 | 17 | 20 |
(iv)
| a | 12 | 22 | 32 | 42 | 52 |
| b | 13 | 23 | 33 | 43 | 53 |
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