Let the speed of the boat in still water be x km/h and speed of current be y km/h. Then, x - y = 12 (upstream), x + y = 18 (downstream). Adding both equations: 2x = 30 → x = 15 km/h. Answer: a) 15 km/h.
A school organizes a picnic for students. The cost of transportation is ₹8,000, and the food cost is ₹5,000. If there are 50 students attending the ...
The sum of eight consecutive even numbers of set-A is 416. What is the sum of five consecutive numbers of another set whose lowest number is 18 more tha...
If 94*6714 is divisible by 11, where * is a digit, then * is equal to
What least number must be added to 6834 to get a number exactly divisible by 18?
Find the smallest integer that must be subtracted from 653, so that it is divisible by both 23 and 27.
One baker house has to make 600 cakes and another one 750 cakes during the same period of time. In the first house, the order was ready 5 days ahead of ...
What is the unit digit of (217)413 × (819)547 × (414)624 × (342)812?
Find the unit digit of the product 127 × 137 × 413 × 291 × 342 × 533 × 342.
What is the average of first 26 multiples of 2.6?
