TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: excluding stoppages , the average speed of a bus is 60 km / hr and including stoppages , the average speed of the bus is 15 km / hr . for how many minutes does the bus stop per hour ?

SOLUTION: 4

PROBLEM: Problem: a and b can do a work in 5 days and 10 days respectively . a starts the work and b joins him after 2 days . in how many days can they complete the remaining work ?

SOLUTION: 2

PROBLEM: Problem: what is the total surface area in square meters of a rectangular solid whose length is 8 meters , width is 7 meters , and depth is 4 meters ?

SOLUTION:
132 m 2