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Let B can empty the tank in = 15 x 2 =30 minutes Let the capacity of a tank be LCM of (25,30)=150 Pipe A efficiency = 150/25 = 6 units/min Pipe B efficiency = 150/30 = 5 unit/min Therefore, required time to fill (80/3)% of the tank when both pipes are opened together is = (4/15) x 150/(6-5) = 40 minutes
Find the remainder when the number (289n + 147) is divided by 17.
A two-digit number has a sum of its digits equal to 9. Additionally, if 27 is subtracted from this number, the resulting number has its digits reversed....
If x and y are the two digits of the number 115xy such that this number is divisible by 90, then the value of x + y is:
Sahil can make a toy in 3 hrs, 25 minutes and 13 seconds. How much time he will take to make 8 such toys?
How many prime numbers are there between 40 to 50?
"PQR is a three-digit number such that it can be expressed as the sum of its three two-digit components, PQ, QR, and RP, where all of them are natural n...
Find the average of first 24 whole numbers.
Find the average of first 23 whole numbers.