The speed of a motorboat in still water is 50 km/hr. If the motorboat travels 120 km along the stream in 1 hour 30 minutes, then the time taken by it to cover the same distance against the stream will be
Let the speed of the current be x km/hr Rate Downstream = (x+ 50) km/hr According to the question 120/(x+50) = 1 hour 30 minutes 120/(x+50) = 3/2 240 = 3x + 150 x= 30 km/hr Rate upstream = 50 – 30 = 20 km/hr Required time = 120/20 = 6 hours
What is the HCF of 4/5, 6/8, 8/25 ?
The H.C.F of two numbers is 8 and their L.C.M is 136. If one of the numbers is 64, find the other?
A vendor has 3 kinds of shakes i.e. chocolate, strawberry and banana. He has 180 litres of chocolate shake, 360 litres of strawberry shake and 540 litre...
Find the greatest number that will divide 115, 149 and 183 leaving remainders 3, 5, 7 respectively.
Find out the sum of digits of largest number that leaves same remainder when it divides 12003, 6006, 5506 and 10006.
HCF of two numbers 64 and 96 can be expressed in the form of (20m – 108) whereas LCM of these two numbers can be expressed in the form of (60n – 18)...
Jiya, Kavya, Shivam, and Mani start walking from the same point in the same direction around a rectangular track and each one of them completes one roun...
LCM and HCF of two numbers are respectively 3 and 18. If one of them is 9, find the other number.
What is the least number which when divided by 3, 15 & 18 leave a remainder 6 in each case & it is also divisible by 12?
The LCM of two numbers is 1991 and their HCF is 23. If one of the numbers is 181, the other number is
