self Maths Puzzle

(a+bc)+(de+f)(a+bc)'solve the expression??

Read Solution (Total 1)

(a+bc)+(de+f)(a+bc)
=(a+bc)+(ade+bcde+af+bcf)
=a+af+bc+bcf+ade+bcde
=a(1+f)+bc(1+f)+de(a+bc)
=(1+f)(a+bc)+de(a+bc)
=(a+bc)(1+f+de)
11 years agoHelpfull: Yes(0) No(0)

self Other Question

2 pipes are running conitinuouslt to fill a tank. The 1st pipe can fill the tank in 5 hours by itself and the second one by itself could have filled in 20 hours. But the operator failed to realize that there was a leak in the tank from the beginning which caused a delay of one hour in the filling of the tank. Find the time in which the leak would empty a filled tank.
option
a) 15 hours
b) 20 hours
c) 25 hours
d) 40hours
e) 30 hours What is the sum of 2320th term of the series 1,2,3,4,1,1,2,2,3,3,4,4,.........??