exam Maths Puzzle Numerical Ability

i am lost, is it possible to foil this, (3+h)^3......the third power is throwing me off here, any help would be greatly appreciated

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exam Other Question

A rectangular room is 1.3 times as long as it is wide, and its perimeter is meters. Find the dimension of the room.

what is the length in meters
what is the width in meters the sum of 3 cpnsecutives odd integers is 40 more than the smallest. What are the integers?