Question

Допоможіть будь ласка розв'язати задачу. На будівництво привезли 126 т цементу, а піску - в 4 рази більше. За день витратили а т піску. Скільки тонн піску залишилося? Склади вираз для розв'язування задачі та обчисли значення, якщо а =450

Answer 1

126*4=504 т песка
504-45054 т осталось песка

Answer 2

Problem Analysis

To solve this problem, we need to find out how many tons of sand are left after a certain amount is used. We are given that 126 tons of cement are delivered, and the amount of sand is four times that of cement. Additionally, a certain amount of sand is used, and we need to calculate how much sand is left.

Solution

Let's denote the amount of sand as S and the amount used as a. We are given that the amount of sand is four times that of cement, so S = 4 * 126.

The amount of sand used is given as a.

To find out how much sand is left, we can use the following expression: Remaining sand = Total sand - Used sand

Substituting the values we have: Remaining sand = S - a

Given that a = 450, we can calculate the remaining sand using the expression: Remaining sand = 4 * 126 - 450

Calculation

Let's calculate the remaining amount of sand: Remaining sand = 4 * 126 - 450 Remaining sand = 504 - 450 Remaining sand = 54

Answer

After using 450 tons of sand, there are 54 tons of sand left at the construction site.