Question
The Shatabdi express from Pune to Delhi was delayed by
snowfall for 18 minutes and made up for the delay on a section of 60 km travelling with a speed of 10 km per hour higher than its normal speed. Find the original speed of the Shatabdi express(according to the schedule).Solution
By travelling at 10km/h higher than the original speed, train is able to make up 18 minutes while travelling 60 km. This condition is only satisfied at an initial speed of 40(and a new speed of 50 km/h). Alternate method: We go by option: 60/40 - 60/(40+10) = 3/2 - 6/5 = 3/10 3/10 x 60 = 18 minutes
- ‘N’ be the highest 3-digit number which leaves a remainder of 3 when divided by 4, 6, and 9. What is the least number that must be added to ‘N’ to ...
Raj scored 140 marks in a test getting 3 marks for each right answer and losing 1 mark for each wrong answer, had 4 marks been awarded for each correct...
A tree increases annually by one - fourth of its height. What will be the height of the tree after 3 years, if it stands today at 64 cm height?
The sum of the squares of two numbers is 250, and the difference between the two numbers is 4. Find the absolute difference between the cubes of these t...
According to a plan, a team of farmers decided to harvest 208 cubic meters of rice in several days. In the first four days, the team fulfilled the daily...
The sum of the digits of a two-digit number is 9, and when the digits are reversed, the number decreases by 45. Find the changed number.
If y = 5, then what is the value of 10y
Find the unit digit of (62375Â - 7).
Which of the following number is rational number?
If the numerator of a fraction is increased by 300% and the denominator is increase by 600%.The resultant fraction is 1/2. What was the original fraction?
