A cylindrical tank has a capacity of 3080 m3. What is the depth of the tank if the diameter of its base is 14 m?
(Take pi = 22/7)
A.23 m
B.25 m
C.20 m
D.22 m
The average age of the three children in a family is 9 years. If the average age of their parent is 39 years, the average age of the whole family is:
A.20 years
B.21years
C.24years
D.27years
In a class, 37 students take a least one of chemistry, Economics and Government, 8 students take Chemistry, 19 take Economics and 25 take Government, 12 students take Economics and Government but nobody takes Chemistry and Economics. How many students take both chemistry and Government?
A.3
B.4
C.5
D.6
If are the roots of equation 6 +5x –x2 =0, find x
A.11
B.-11
C.1
D.-1
Three teachers shared a packet of chalk. The first teacher got 2/5 of the chalk and the second teacher received 2/15 of the remainder. What fraction the the third teacher receive?
A.8/15
B.11/25
C.12/25
D. 13/25
Evaluate x in base 3 if 41x-22x=17x.
A.11
B.8
C.12
D.22
What is the integral value of x which satisfy the inequality -1 < 3 -2x
≤ 5?
A.-1. 0, 1, 2
B.-2, 1, 0 , -1
C.0, 1, 2
D.-1, 0, 1
Given the scores: 4, 7, 8, 11, 13, 8 with corresponding frequencies: 3, 5, 2, 7, 2, 1 respectively. Find the square of the mode.
A.49
B.121
C.25
D.64
Evaluate 21.05347 - 1.6324 x 0.43 to 3 decimal places