180
60
25
20
Correct answer is D
Let x rep. numbers of boys that can work at 54 the rate at
which the 10 girls work
For 1 hrs, x boys will work for 15×104
x = 54 x 10
= 8 boys
8 boys will do the work of ten girls at the same rate
4 + 8 = 12 bous cut the field in 5 hrs for 3 hrs,
12×53 boys will be needed = 20 boys.
If sin θ = 4/5 where 0° ∠ θ ∠ 900, what is the value of cos θ + tan &t...
The length of the parallel sides of a trapezium are 5cm and 7cm. If its area is 120cm2, find th...
Make t the subject of k = m√t−pr...
Simplify 313 - 114 x 23 + 125...
solve the equation cos x + sin x 1cosx−sinx for values of such that 0 ≤ x < 2...
A circular arc subtends angle 150° at the centre of a circle of radius 12cm. Calculate the ...
Find the values of x and y respectively if \(\begin{pmatrix} 1 & 0 \\ -1 & -1\\ 2 & 2 \...
Two perfect dice are thrown together, Determine the probability of obtaining a total score of 8...
What percentage of observation lie outside interquartile range of any distribution? ...
Without using tables, simplify 1n√216−1n√125−1n√82(1n3−1n5)...