The ratio of the present ages of P and Q is 8:7 respectively. If the age of P 10 years hence from now will be 100% more than the age of Q 4 years ago from now, then find the age of P 5 years ago from now.
Let the present ages of P and Q be 8x and 7x years respectively. According to the question, => 8x + 10 = 2(7x – 4) => 8x + 10 = 14x - 8 => 6x = 18 => x = 3 Required age = 8x – 5 = 19 years
If the sum of upstream and downstream speed is 20 km/hr and the speed of the current is 5 km/hr. Then find time taken to cover 45 km in downward?
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(√3364+ √484) – √2916÷ √1296 × √36 ÷ √64 = ?
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