None of these are true roots.
a. The closest true root to √50 is 7.
7^2 = 49
b. The closest true root to √150 is 12.
12^2 = 144
c. The closest true root to √350 is 19.
19^2 = 361
d. This is a cubed root, rather than a square root.
The closest root to 3√350 is 7.
7^3 = 343
Answer:
9/10
Step-by-step explanation:
well use distributive property so it be (3x16)-(3x10) --- > 48-30= 18
2x10= 20 so it be 18/20 reduce---> 9/10
Answer:
12,000 m³
Step-by-step explanation:
- Area of it's base = 900 m²
- Height of the pyramid = 40 m
The volume of a pyramid = 1/3 × area of base × height
= 1/3 × 900 × 40
= 300 × 40
= 12,000 m³
Answer:
Step-by-step explanation:
The motorist drove at a distance of 90km at a constant speed for the first 40km, and then 20 km/hr faster for the rest of the journey.
The whole journey took him 1hr.
Let S denotes the average speed (in km/hr) for the first 40 km.
Hence we get the following relation,
40/S + (90 - 40)/(S + 20) = 1
or 50/(S + 20) = 1 - 40/S = (S - 40)/S
or (S + 20)(S - 40) = 50S or S^2 - 70S - 800 = 0 or (S - 80)(S + 10) = 0
or S = 80 (km/hr) [Ans]
[S cannot be negative value]
