Question

Some Math's questions. Answer please, I will mark as brainliest to the answerer.

1) Formula to find surface area of cuboid.
2) Replace * by a digit so that it is divisible by 11 in the no. 86*6194
3) If the difference of two digit no. and no. obtained by reversing the digit is 45, then write all the possible 2-digit numbers.
4) A shopkeeper was involved in tax invasion. To save sales tax, he never gives recipients to his customers. He sold an article for Rs.550 including 10% V.A.T. Find the amount of V.A.T. not paid by him to the government.
5) Marked Price of an article is Rs.2860 and the rate of V.A.T is 8%. Shopkeeper allows a discount of 20% and still makes a profit of 10%. If he spent 4 % as overheads, the find original CP of article and final SP including VAT.

Answer 1

1. To find the surface area of cuboid, add the areas of all 06 faces. We can also label length(l), width(w), and height(h) of the prism and use the formula surface area =2×lenght×width+2×length×height+2×height×width, to find the surface area