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A cuboid has edge 7 centimetres, 5 centimetres and a total surface area of 142 centimetres squared. A larger, similar cuboid has a shortest edge of 12 centimetres. Find the third edge of the smaller cuboid and the volume of the larger cuboid.

Let's call the length of the third edge "Y" so we have edges of 7cm, 5cm and Ycm.There are 6 faces but opposite faces are the same, so there are 3 pairs of faces which are 5cm by 7cm, 5cm by Ycm...

Answered by Ollie R. • Maths tutor

5208 Views

How is the past tense formulated in French?

At GCSE, one would need to know two versions of the past tense, the passé composé and the imparfait. The P.C. is used to explain events that happened just once and can be in the near or ...

Answered by Ellis H. • French tutor

1715 Views

What is interesting about the form of Mary Shelley's 'Frankenstein'?

The 2 key formal features of Frankenstein are the use of epistolary form and an embedded or framed narrative.
A novel written in epistolary form develops the narrative t...

Answered by Julian G. • English Literature tutor

18493 Views

Prove that sin(x)^2 - 5cos(x)^2 = 6sin(x)^2 - 5

5 = 5(cos(x)^2 + sin(x)^2) = 5cos(x)^2 + 5sin(x)^2=> 5 - 5cos(x)^2 = 5sin(x)^2=> sin(x)^2 + 5 - 5cos(x)^2 = 6sin(x)^2=> sin(x)^2 - 5cos(x)^2 = 6sin(x)^2 - 5

Answered by Nicholas T. • Further Mathematics tutor

2174 Views

How do you break down a wordy question (e.g. Aled has three concrete slabs. Two slabs square, of length x, & the third rectangular of dimensions 1m & x+1m. Show 2x^2 +x-6=0 & Solve this)

Start off by taking a breather. Let's break this down into the components of the problem, in this case the three slabs (a,b,c)A_a=lh=xx=x²A_b=A_a=x^2...

Answered by Gwynfor M. • Maths tutor

3211 Views