Question

four bells ring at intervals of 14 42 49 84 second respectively if bells ring together at 5 p.m. at what time will the four bells ring together next​

Answer 1

Answer:

r=− 21

S 10 = 1−ra(1−r 1 )

S 10 = 1+ 21

96 ⎝⎛ 1−(− 2 )10⎞

=96× 32 ×( 2 12 10 −1 )=64( 2 102 10 −1 )

= 2 42 10 −1

= 161023