Question
A is cycling at an average speed of 10 km/hr such that
he can reach a certain point at 12 noon. If he cycles at 15 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 10 km/hr = (x/10) hours Time taken when speed is 15 km/hr = (x/15) hours According to the question, (x/10) – (x/15) = 2 Or, 3x – 2x = 2 × 30 Or, x = 60 km Time taken to travel 60 km with speed of 10 km/hr = 60/10 = 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 = 60/5 = 12 km/hr
Who among the following is the author of “Prithvirajaraso”?
What is the chemical formula of table salt?
- Which planet was the first to be discovered through mathematical predictions rather than direct observation?
Which of the following pairs is incorrectly matched?
Who had won the Tata Steel Chess India Blitz title for the year 2024?
In April 2025, which brand appointed Ananya Panday as its Indian ambassador?
Who among Indian cricket players achieved an impressive milestone by reaching 4,000 runs in just 116 innings in men's T20 cricket, making it the fastest...
- What happens when Napalm comes into contact with surfaces like human skin?
Which IIT and Kotak Mahindra Bank Ltd have collaborated to establish the Kotak School of Sustainability?
Which are the top export markets for India’s textiles and apparel?
Relevant for Exams:
