Answer:
14 hours
Step-by-step explanation:
Let's call the task 3x
The older bro does twice as younger so it would be 2x long and younger brother work x long
Since the totsl of work is 3x = 21 x woul be 21÷3 = 7
the older brother must work 2 × 7 = 14 hours long
Answer:
therdgsger
tgtrs
Step-by-step explanation:
Answer:
4000
Step-by-step explanation:
100 - 14 = 86
Here we shall take 86 to obtain the number easily
X × 86/100 = 3440
X = 3440 × 100 / 86
So X = 40 × 100
X = 4000
