If 6A = 11B = 7C; find A : B : C

The curved surface area of a hemisphere is 27.72 sq cm and volume is 19.404 cubic cm, find its radius?

One diagonal of a rhombus is half the other. If the length of the side of the rhombus is 20 cm, what is the area of the rhombus?

Find the sum of the measures all the interior angles of a polygon having 12 sides.

10% discount is offered on an item. By applying a promo code the customer wins 5% cash back. What is the effective discount?

The slope of the line passing through the points (7,-2) and (x,1) is -3/10. Find x.

The average revenues of 7 consecutive years of a company is Rs 83 lakhs. If the average of first 4 years is Rs 78 lakhs and that of last 4 years is Rs 90 lakhs, find the revenue for the 4th year.

A carpenter can build a cupboard in 48 hours. After 12 hours he takes a break. What fraction of the cupboard is yet to be built?