Let the speed of stream be ‘x’ km/hr. So, speed of boat in still water = 6 × x = 6x km/hr Downstream speed of boat = 6x + x = 7x km/hr According to question; 7x = 147/7 = 21 Or, x = 3 Upstream speed of the boat = 6x – x = 5x = 5 × 3 = 15 km/hr Required time taken = 135/15 = 9 hours
When is World Homeopathy Day celebrated annually?
What milestone did Rani Rampal achieve, making her stand out in Indian women's hockey history?
The Mars rover ‘Perseverance’ was launched by which space agency.
Which of the following land settlement systems adopted by the English provided greater protection to the interests of farmers?
Who has been conferred with the ‘Order of the Rising Sun, Gold and Silver’ award by the Japan government ?
Who was the winner for the year 2019 for Dada Saheb Phalke Excellence award?
Which dynasty started using mother’s name before their name?
Who was the flagbearer for India at the Paris Olympics' closing ceremony?
ध्वनि प्रदूषण को मापने की इकाई है ?
World Wildlife Day is celebrated on?
