Question
A is cycling at an average speed of 20 km/hr such that
he can reach a certain point at 12 noon. If he cycles at 30 km/hr, then he will reach the destination at 10 a.m. At what speed he should cycle to reach the destination at 11 a.m.Solution
Let the distance to be travelled be ‘x’ km Time taken when speed is 20 km/hr = (x/20) hours Time taken when speed is 30 km/hr = (x/30) hours According to the question, (x/20) – (x/30) = 2 Or, 3x – 2x = 2 × 60 Or, x = 120 km Time taken to travel 120 km with speed of 20 km/hr = 120/20 = 6 hours Therefore, he started at 12 – 6 = 6 a.m. Therefore, required speed to reach the destination at 11 a.m. or 5 hours = 120/5 = 24 km/hr
What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)...
A question and two statements labeled (I), (II) are given. You have to decide which statement(s) is/are sufficient to answer the question.
Gowth...
Train 'A' takes 19 seconds to cross a pole and 18.75 seconds to cross train 'B', which is 440 metre long and moving at the speed of 24 m/s towards train...
- ‘m’ is the number of prime numbers from 1 to 100 and ‘n’ is the number of prime factors from 101 to 125. Find the value of m × n.
Select the letter-cluster from among the given options that can replace the question mark (?) in the given series.
DXC, GTH, ?, MLR, PHW
Choose the Venn diagram which best illustrate the three given classes.
Dog, Animal, Pet.
Worker 'A' can complete the entire task alone in 12.5 days, while worker 'B' can finish it in 25 days. If they take turns working on the task each day, ...
Which of the following statements is / are true?
- The ratio between the cost price of a cup and a glass is 8:5 respectively. The cup is sold at a profit of 37.5% and glass is sold at a loss of 20%. If the ...
Sum and difference of two natural numbers is 92 and 36. Find the larger number.
Relevant for Exams:
