Question
47 masons can dig a 35 m long trench in one day. How
many masons should be employed for digging a 105 m-long trench of the same type in one day?Solution
To dig a 105 m-long trench in one day: 47 masons/35=x masons/105 x = (105×47)/35 =47×4 141 masons are needed.
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15 × 3 ÷ 15 – (45 × 3) – 10 + (13 ÷ 2) = 76
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Which two signs should be interchanged to make the given equation correct?
912 – 456 × 28 + 390 ÷ 2 = 444
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