Practice the following problems :
In a two digit number, the unit digit is 5 less than ten's digit. Sum of digits one-eight
of the number find the number ? (AS-D
In a two digit number, the digit in ten's twice the digit in units. The number formed
by reversing the digits 36 less than the number. Find the number ? (AS-II, IV)
Sum of digits of two digited number is 7. If 9 is subtracted from it. The digits are
reversed. Find the number ? (AS-1)
A and B together can finish a piece of work in 12 days. If 'A' alone can finish the same
work in 20days, in how many days B alone can finish it? (AS-D
If a train runs at 40 kmph it reaches its destination late by 11 minutes. But if it runs
at 50 kmph it is late by 5 minutes only. Find the distance to be covered by the train.
(AS-IV)
A man had to walk a certain distance. He covered two thirds of it at 4kmph and the
remaining at 5 kmph. If the total time taken is 42 minutes, find the total distance. (AS-IV)
Answers
Answer:
now to solve tens digit is equals to X + 5 when 16 digit or unit digit is equals to X now the sum of the digits will be 2 X + 5 and and the number will be formed as 10 X + 50 or x+5(x) now this is this number is 1 eight of the number for the real value of x only possible solution is that 72 here sum is 9 which is one eighth as x=2
Step-by-step explanation:
here 12x+36=21x x=4 and this no. is 84
3.10x +y = 10y+x-9 here x=y-1and so no.is 43
4.1/20+1/x =1/12 which is power to finish work in one day from whole 1 so x=12 so b has take 12 days
5. let the time be t now so 40(t+11/60)=d
here also another equation is 50(t+1/12)=d now to solve this equation and we get d=109/3
6.here 4t=2/3x and 5g=1/3x as the remaining distance now here we will add by multiplying by 4,5 and we get 20(t+g)=14/3x and then we have t+g =42/60 hour so we get x=3km