S.P. of 1 litre of mixture = Re.1, Gain = | 50 | %. |
3 |
∴ C.P. of 1 litre of mixture = | ❨ | 100 x | 3 | x 1 | ❩ | = | 6 |
350 | 7 |
By the rule of alligation, we have:
C.P. of 1 litre of water C.P. of 1 litre of milk | |||||
0 | Mean Price
|
Re. 1 | |||
|
|
∴ Ratio of water and milk = | 1 | : | 6 | = 1 : 6. |
7 | 7 |
Suppose they meet after y hours .
Then, 21y - 16y = 60
? y = 12
?required distance = (16 x 12 + 21 x 12) km.
= 444 km.
Let Reena?s present age be 'K' yrs.
Given:{(K+3) x 4} - {(K-3) x 3)}
=> K = 21 yrs
So her present age is 21 yrs.
Then, her age after 1 year is 22 yrs.
Let C's age be x years.
Then, B's age = 2x years.
A's age = (2x + 2) years.
(2x + 2) + 2x + x = 27
5x = 25 => x = 5
Hence, B's age = 2x = 10 years.
suppose the ages of Sunil and Anil are 8x yr and 7x yr, respectively.
After 6 yr, = 136x + 102 = 133x + 114
136x ? 133x = 114 ? 102
3x = 12 X = 12/3 = 4
Age of Sunil = 8x = 8 × 4 = 32 yr
Present age Anil = 7x = 7 × 4 = 28 yr
Required difference = (32 ? 28) = 4 yr
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