Question

1. The minute hand of a clock moves through a distance of 20 minutes. The angle made between its initial and final position would be:
(1) 90° (2) 100 (3) 120° (4) 150°​

Answer 1

Answer:

Explanation:'s 1 day's work = 1 / 72

(B + C)'s 1 day's work = 1/120

(A + C)'s 1 day's work = 1 /90

2(A + B + C)'s 1 day's work =172+1120+190

(A + B + C)'s 1 day's work = 5+3+4360X2=12360X2=160

A's 1 day's work = (A + B + C)'s 1 day's work - (B + C)'s 1 day's work

=160−1120=2−1120=1120

A alone can finish the work in 120 days.

Answer 2

Answer:

the answer is (3)

Explanation:

in 1 hour the minutes hand moves 360 degrees so

60 minutes = 360 degrees

20 minutes = 360/3

20 minutes = 120 degrees