Let speed of boat in still water and speed of boat in upstream be ‘7x’ km/h and ‘4x’ km/h, respectively. Speed of stream = 7x – 4x = 3x km/h Speed of boat in downstream = 7x + 3x = 10x km/h So, 10x = 450/5 = 90 Or, x = 9 Speed of boat in still water = 7 × 9 = 63 km/h Desired time = 21/63 = 20 minutes
Train ‘A’ can cross a pole in 8 seconds and a 140 metre long platform in 12 seconds. If the ratio of length of train ‘A’ and train ‘B’ is 2:...
International labour organization convention 177 was recently seen in the news, is related to?
According to the Social Security Code, 2020, the employer's contribution to the deposit-linked insurance fund set up under the insurance scheme should n...
The ratio of the number of English books to Hindi books in a library shelf is 3:2. If 140 Hindi books are written by Pradeep, which constitutes 35% of t...
With reference to service sector in India, Consider the following statements:
1. The share of Services in GVA has been steadily rising for the ...
In ΔABC, PQ is parallel to BC If AP: PB= 3:7 and AQ= 3 cm, AC is equal to?
Consider the following statements:
1. Water has high specific heat capacity of than ice
2. Heat capacity of cooking oil is lower than the ...
In which of the following regions, The Mahalwadi settlement was applied?
Which state witnessed the foundation stone-laying ceremony of India's first Digital Science Park by Prime Minister Modi?
The number of boys and girls in a school is 150 and 280 respectively. 30% of boys left the school while 20 girls took admission in the school. Find the ...
