Question
A man can row 8 km/hr in still water. If the speed of
the current is 2 km/hr, it takes 3 hours more in upstream than in the downstream for the same distance. The distance isSolution
Let the required distance be x km. Therefore, x/(8 – 2) – x/(8 + 2) = 3 ⇒ x/6 – x/10 = 3 ⇒ (5x – 3x)/30 = 3 ⇒ x = 3 x 30/2 = 45 km
If the sum of 2 numbers is 185, their LCM is 1700 and HCF is 5. Then the difference between 2 numbers is:
Find the HCF of 932 and 748.
If the highest common factor of two numbers is 20, then which of the following may be the least common multiple of the numbers?
Two men started moving in a circular path from the same place at the same time in the same direction. If they complete one revolution in 12 min and 16 m...
Sum of the two numbers is 42. LCM and HCF of that two number is 72 and 6 respectively. Find the sum of reciprocals of the numbers?
Sum of the two numbers is 32 and their HCF and LCM are 4 and 60, respectively. Find the sum of reciprocal of the given two numbers.
If the highest common factor of two numbers is 25, then which of the following may be the least common multiple of the numbers?
What is the difference between the LCM and HCF of 36, 40?
The HCF and LCM of two natural numbers are 8 and 48, respectively. What is the difference between the two numbers, if one of the numbers is 16?
HCF of two numbers = 12, LCM = 660, one number = 60. Find the other.
