Question
A man can row 12 km/hr in still water. If the speed of
the current is 3 km/hr, it takes 4 hours more in upstream than in the downstream for the same distance. The distance isSolution
Let the required distance be x km. According to the question ⇒ x/(12 – 3) – x/(12 + 3) = 4 ⇒ x/9 – x/15 = 4 ⇒ (5x – 3x)/45 = 4 ⇒ x = 4 x 45/2 = 90 km
Which of the following number is rational number?
One baker house has to make 600 cakes and another one 750 cakes during the same period of time. In the first house, the order was ready 5 days ahead of ...
- A number when divided by 45 leaves 38 as remainder. If the same number is divided by 15, the remainder would be:
A positive number becomes 9 times its reciprocal when 3 is added to it. Find this number.
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 30 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The sum of three consecutive even numbers is 84. Find the middle number.
- Find the remainder when the number (289n + 119) is divided by 17.
The divisor is 35 times the quotient and 7 times the remainder. If the quotient is 18, the dividend is :
On dividing (5757 + 57) by 58, the remainder obtained is ‘R’. Find the value of (R – 5).
Find the last digit of (12123 – 1).
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