Aptitude - Average - Discussion

husband+wife+child =3 years ago =27 present age =30 (27+3=30)
wife and child = 5 years ago =20 present age=25 (20+5=25)
h+w+c =3*30=90 -- I
w+c =2*25=50 --II
substract(I-II) 90-50=40 year

Ramya your way of answering this was very good.

When the solution is started like this
husband=x,wife=y&child=z
bf4 3yrs x-3+y-3+z-3/3 =27
terefore x+y+z=90--1
bf4 5yrs y-5+z-5/2 =20
terefore y+z=50---2 (1-2)
terefore x=40

Average of present ages of h,w,c=27+3=30
Average of present ages of w,c =20+5=25

so age of husband = 90-50=40

10. In a two-dimensional array, X (9, 7), with each element occupying 4 bytes of memory, with address of the first element X (1, 1) is 3000; find the address of X (8, 5).

11. One boy can eat 100 chocolates in half a minute, and another can eat half as many in twice the length of time. How many chocolates can both boys eat in 15 seconds?

12. Potatoes are made up of 99% water and 1% "potato matter." Jack bought 100 pounds of potatoes and left them outside in the sun for a while. When he returned, he discovered that the potatoes had dehydrated and were now only made up of 98% water. How much did the potatoes now weight?

13. You own a pet store. If you put in one canary per cage, you have one canary too many. If you put in two canaries per cage, you have one cage too many. How many canaries and cages do you have?

14. Find the value of @@+25-++@16, where @ denotes "Square" and + denotes "square root".

15. A power unit is there by the bank of the river of 750 meters width. A cable is made from power unit to power plant opposite to that of the river and 1500mts away from the power unit. The cost of the cable Rs.12/- per meter. Find the total of laying the cable.

16. In Madras, temperature at noon varies according to -t^2/2 + 8t + 3, where t is elapsed time.Find how much temperature more or less in 4pm to 9pm.

1. A bus is started from the bustand at 8am and after staying 30min at a destination return back to the busstand.The destination is 27 miles from the busstand.The speed of the bus is 18mph.In return journey the bus travels with 50% fast speed.At what time it is return to the bus stand.

a 11am b 1pm c 11pm d 10am

2. Person who decided to go to the weekend trip should not exceed 8hrs driving a day.Average speed of forward is 40mph.Due to the traffic in sunday in return journey average speed is 30mph.How far he can select a picnic spot?

a 120 b 240 c 360 d 40

3. Find the value of @@+25-++@16,where @ denotes square and + denotes "square root"?

4. In a two dimensional array,X(9,7) with each element occupy 4 bytes of memory, with the address of the first element x(1,1) us 3000.find the address of x(8,5)

Can anyone help me in finding the solution for this problem as soon as possible?

Thanks ramya.

Its simple:

Avg of 6 family members before 10 years is (Hus-10)+(wife-10)+(fath-10)+(othrs-30)/6 at 10 years ago.. By simpllifing abv we get (hus+wife+fath+othrs-60)/6

Present age average(Here babe replaces father): (Hus+wif+Babe+others)/6

As per given condition equate both the abv equ: U'll get Father's age=60 years..!! QUITE EASY NA ??

Its so easy ramya thanks.

Thanks ramya.