Question
Speed of current is equal to 15% of speed of boat in
still water. If the boat takes 12 hours to cover 120 km in still water, then find the time taken by the boat to cover 17 km in upstream.Solution
Speed of the boat in still water = 120 ÷ 12 = 10 km/h Speed of current = 10 × 0.15 = 1.5 km/h Therefore, upstream speed of the boat = 10 – 1.5 = 8.5 km/hr Required time taken = 17 ÷ 8.5 = 2 hours
- Kiran shared 288 toffees among his three friends Sonu, Monu and Tanu in the ratio 2:3:7 respectively. Find how many more toffees Tanu received than Sonu.
The ratio of prices listed for a bag and that of a belt is 2:1. In a sale, there was a discount of 40% on the belt. At the time of checkout, Ankit notic...
Total population of city P and Q is 2720 and 3300 respectively. If the ratio of number of males to females in city is P and Q is 5:3 and 3:2 respectivel...
The ratio of A's income to savings is 25:9, and B's expenditure is 60% of A's total income. If B's expenditure exceeds its savings by Rs. 3500, and A's ...
The average mark obtained by 150 candidates in a certain examination is 45. If the average marks of passed candidates are 55 and that of the failed cand...
- Four friends ('W', 'X', 'Y', and 'Z') went to dinner and received a bill of Rs. 1,800. They agreed that 'W' would pay half of what the other three paid tog...
If A: B = 2:3 and B: C = 3:4 find the value of (A+B): (B+C): (C+A).
The incomes of A and B are in the ratio of 3:2 and their expenditures are Rs. 14,000 and Rs. 10,000 respectively. If A saves Rs. 7000, then B's savings ...
Rohit, Manish, Suresh, and Arjun were playing a football match. The ratio of goals scored by Rohit and Manish was 6:9 respectively, while that between M...
Difference between the ages of A and B is same as the difference between the ages of B and C. The difference between the ages of A and C is 8 years. If ...