exam Maths Puzzle Numerical Ability

A light bulb consumes 960 watt-hour per day. How long does it take to consume 4480 watt-hours?

Thank you so much,

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exam Other Question

Find the surface area of a right solid 8" high with the base of 10" x 10" x 4". Factor x^-1/3 out of x^1/3 + x^-1/3
I multiplied x^1/3 by x^-1/3 and got x^-1 and then factored out the x^-1/3 and my answer i got was x^-1/3(i/x + 1) is this correct