In this task, you need to answer the given multiple-choice question on the physics. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: 28 buckets of water fill a tank when the capacity of each bucket is 13.5 litres . how many buckets will be required to fill the same tank if the capacity of each bucket is 9 litres ? 
Options: a ) 30 , b ) 42 , c ) 60 , d ) data inadequate , e ) none of these
[EX A]: b

[EX Q]: Problem: two trains a and b are 125 m and 150 m long and are moving at one another at 54 km / hr and 36 km / hr respectively . arun is sitting on coach b 1 of train a . calculate the time taken by arun to completely cross train b . 
Options: a ) 10 s , b ) 11 s , c ) 4 s , d ) 8 s , e ) 12 s
[EX A]: b

[EX Q]: Problem: find the area of a cuboid of length 8 cm , breadth 6 cm . and height 9 cm . 
Options: a ) 400 cm cube , b ) 410 cm cube , c ) 420 cm cube , d ) 432 cm cube , e ) 480 cm cube
[EX A]:
d