Answer:
Explanation:
step 1 : finding the area of a floor using trapezius area formula
A=

step 2 : the problem said 1 litre of paint convers an area of 2.5 m^2, so let's calculate how many liters of paint are needed to paint the floor

so we need 28.8 litre to paint the floor
step 3 : Each tin is 5 litre of paint so let's calculate how many tins do we need
n=
we can't by 5.76 tins so it's 6 tins
step 4 : Each tin costs 21.99 and now we calculate how much 6 tins cost for us
cost = 6 × 21.99 = 131.94
step 5 : Gary has a budget of 150 and the total cost is 131.94. So, Gary has enough money to buy all the paint he needs.