Postal Government Jobs Exams Numerical Ability

if the 1st year's interest on a certain sum of money placed at 5% per annum compound interest is Rs. 1200,What will be the interest for the 3rd year?
a- 1220
b- 1323
c- 1423
d- 1330

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Postal Other Question
If sohail walks from his home to office at 16km/hr.he is late by 5 min.If he walks at 20km/hr.he reaches 10 min before the office time. Find the distance of his office from his home?

(a)22km
(b)20km
(c)18km
(d)16km 3 men can do a piece of work in 6 days, 5 women can do the same work in 18 days. If 4 men and 10 women work together, then how long will it take to finish the work.
a- 3 days
b- 5 days
c- 2 days
d- 4 days