Quantitative aptitude and basic computer aptitude quiz

1)The retail price of rice decreased from Rs. 16 kg to Rs. 12 per kg. Find the percentage decrease.
a. 25%
b. 33.3%
c. 12.5%
d. 20%

2)A train 280 meters long is moving at a speed of 60 km/hr. The time taken by the train to cross a platform 220 meters long is
(a) 30 seconds
(b) 25 seconds
(c) 35 seconds
(d) 20 seconds