Question

На стройку нужно привезти 180 т кирпича. Большой самосвал может вывизти этот груз за 20 рейсов, меньший-за 30 рейсов. За сколько рейсов вывезут они этот груз, если будут работать вместе?

Answer 1

1)180:20=9(т)- большой вывозит за 1 рейс

2) 180:30=6(т)- маленький вывозит за 1 рейс

3) 9+6=15(т)- оба вывезут за 1 рейс

4) 180:15=12(т)- за столько рейсов вывезут вместе

Ответ: вместе грузовики вывезут груз за 12 рейсов.

Answer 2

1)180:20=9

2) 180:30=6

3) 9+6=15

4) 180:15=12

ответ:12

Answer 3

Calculation of the Number of Trips Required

To determine the number of trips required to transport 180 tons of bricks, we need to compare the capacity of the large dump truck and the smaller one.

According to the information provided, the large dump truck can transport the entire load in 20 trips, while the smaller one can transport it in 30 trips.

To find the number of trips required when both trucks work together, we can use the concept of the least common multiple (LCM) of 20 and 30.

The LCM of 20 and 30 is 60. This means that both trucks will synchronize their trips every 60 trips.

To calculate the number of trips required when both trucks work together, we divide the total number of trips (60) by the LCM (60) and multiply it by the total load (180 tons):

Number of trips required = (Total number of trips / LCM) * Total load

Number of trips required = (60 / 60) * 180 = 180

Therefore, when both trucks work together, they will be able to transport the entire load of 180 tons in 180 trips.

Please note that the information provided is based on the assumption that the trucks have a constant capacity and can make trips without any delays or interruptions.