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.
A school girl spends 14 of her pocket money on books and 13 on dress....
If two graphs Y = px2 + q and y = 2x2 − 1 intersect at x =2, find the value of p in terms of q...
If loga3 = m and loga5 = p, find loga75...
The area of a square is 144 sq cm. Find the length of its diagonal ...
Find the value of y, if log (y + 8) + log (y - 8) = 2log 3 + 2log 5 ...