exam Maths Puzzle Numerical Ability

A roofer earns $24 per hour plus $36 per hour overtime. If he puts in 40 hours of regular time during a certain week and he wishes to earn $1200, how many hours of overtime should he work?

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how do you find the lateral surface area of a square based pyramid with base 4 m and height 4 m, and the slant side is 6, :S
its in the grade 12 college and apprenticiship mathem jenet plants 20 varietiesof flowers in the spring.she reports that 90% of the varieties of flowers she planted have blooomed.

how many varieties Have bloomed?