Question { 4234 }

. A train travels a certain distance taking 7 hrs in
forward journey, during the return journey increased speed
12km/hr takes the times 5 hrs.What is the distance traveled

Answer

210 km per hour

Question { Banking, 16723 }

three numbers are in the ratio 2:3:5 and the sum of their
squares is 152, what will be their sum ?

Answer

let the three numbers be 2x, 3x ,5x

sum of their squares is to be 4x^2+9x^2+25^2 = 152

then, 38x^2=152

x^2=4
x=2

the sum of the numbers = 2x+3x+5x=2*2+3*2+5*2=4+6+10

=20 (ans)