$\triangle PQR$ is a equilateral triangle with sides $2\sqrt{3}cm$ calculate its height

The Venn diagram shows the choice of food of a number of visitors to a canteen. How many people took at least two kinds of food?

The Venn diagram shows the choice of food of a number of visitors to a canteenthere were 35 visitors in all, find the value of x

If the ratio  x : y = 3 : 5 and y : z = 4 : 7, find the ratio x: y : z

At what rate percent  will N520.00 yield a simple interest of N39.00 in three years 

A messenger was paid N2.50  an hour during the normal working hours and N4.00 an hour during overtime. If he received N31.00 for 10 hours works, how many hours are for the overtime?

Find the value of a if ${{\log }_{10}}a+{{\log }_{10}}{{a}^{2}}=0.9030$

The bearing of a point P from another point Q is 310^o. If $\left| PQ \right|=200M$ how far east of Q is P?

In the diagram$\left| PQ \right|=4cm$, $\left| QR \right|=6cm,\text{ }\left| RS \right|=12cm$ $\angle QRS={{90}^{\circ }}$. Find the value of x

Q is 32km away from P on a bearing of 042^o and R is 25km from P on a bearing of 132^o. Calculate the bearing of R from Q