Question
The ratio of the speed of the boat in upstream to that
of in downstream is 5:9, respectively. If the speed of the current is 7 km/h, then find the speed of the boat in still water.Solution
According to the question: Let the speed of the boat in still water = x km/h Speed of the boat downstream = (x+7) km/h Speed of the boat upstream = (x−7) km/h ATQ, (x−7):(x+7)=5:9 9(x−7)=5(x+7) 9x−63=5x+35 9x−5x=35+63 4x=98 x=24.5 km/h
Naresh, Dinesh, and Ramesh became partners in a business by investing money in the ratio of 3: 6: 8. If their investments are increased by 5%, 15%, and ...
300 is divided into two parts such that thrice of the first part and twice of the second part are in ratio 21:16, respectively. Find the difference betw...
A sum of money is divided among P, Q, R and S in the ratio of 1:2:6:7 respectively. If the share of R's is Rs. 2860 more than the share of Q, then what ...
- Find the third proportion to 16 and 24.
Ratio of males to females in village ‘A’ and village ‘B’ is 4:5 and 19:20, respectively and number of females in village ‘B’ is 25% more tha...
A sum of money is divided among P, Q, R and S in the ratio of 5:6:10:11 respectively. If the share of R's is Rs. 2440 more than the share of Q, then wha...
The marks obtained by X and Y in a quiz are in the ratio 7:5 respectively. If Y had scored 5 more marks, then the marks scored by X would be 30% more th...
The average height of three boys is 170 cm. If their heights are in the ratio 6:4:7, what is the height of the tallest boy?
The ratio of A's age to B's age is 1:4, and the ratio of B's age to C's age is 4:5. D is 20 years older than B. Additionally, the ratio of C's age to D'...
A man gives 2/5 of his property to his son, 1/8 in charity and 3/7 to his daughter. If he had ₹3250 left, then find the money given by him in charity.
