Question
The most abundant element in the Earth’s crust is:
Solution
Oxygen constitutes ~46.6% of the crust by weight, followed by silicon (27.72%).
A boat travels upstream at a speed of 10 km/h and downstream at 15 km/h. If the boat travels 30 km upstream and then returns, how much time does it take...
- A boat takes 9 hours more to cover 270 km upstream than to travel 180 km downstream. If the speed of the boat is ‘4x’ km/hr and the speed of the stream...
A man can row his boat with the stream at 42 km/h and against the stream in 7 km/hours. The man’s rate is
The speed of the boat in still water is 12 km/hr and the speed of the stream is 9 km/hr. A boat goes 105 km downstream with its usual speed but at the t...
A boat's speed in still water is 50% greater than the speed of a stream, which flows at 12 km/h. Calculate the total time it takes for the boat to cover...
The speed of the stream is 20 km/h. Boat ‘A’ covers 120 km distance against the stream in 6 hours and boat ‘B’ covers 120 km distance against th...
A boat covers a certain distance upstream in 6 hrs and comes back to starting point with current in 3 hrs, If boat's upstream speed is 15 km/hr, then, f...
Speed of boat is 10 km/hr. Speed of the stream is 20% less than speed of boat. Then find time taken by boat to go 90 km downstream?
A man rows upstream 18 km and downstream 30 km taking 6 hours each. Find the man’s speed in still water.
- The speed of a boat in still water is 40% less than its speed while moving downstream. If the boat takes 8 hours to travel 160 km upstream, how long will i...
Relevant for Exams:
