Question
The surface areas of three faces of a cuboid sharing a
vertex are given as 25 m², 32 m² and 32 m². What is the volume of the cuboid?Solution
We have, ⇒ Length × Breadth = 25 m2 ⇒ Breadth × Height = 32 m2 ⇒ Height × Length = 32 m2 Multiplying the above three equations, we get, ⇒ (Length × Breadth × Height)2 = 25 × 32 × 32 Taking square root on both sides, ⇒ (Length × breadth × Height) = 5 × 32 ⇒ Length × breadth × Height = 160 ⇒ Volume of cuboid = 160 m3 ∴ The volume of cuboid is 160 m3
A started a work such that he can complete the whole work in 30 hours. After working for 10 hours, he worked with the rate such that the whole work can ...
P can do a piece of work in 10 days, Q can complete double the work in 30 days and R can do the work in 20 days. If all of them together earn Rs. 3900, ...
A group of 8 men or 10 women can complete a certain task in 21 days. How many days will it take for a combination of 10 women and 4 men to complete the...
βAβ alone can complete a work in 40 hours. βAβ started the work alone and left after working on it for 20 hours. If βBβ completed the rest o...
βMβ and βNβ together can do a piece of work in 50 days. If βMβ is 50% more efficient than βNβ, how long will βNβ take to do the work...
Aβ and βBβ together can complete a work in 15 days while βAβ takes 20 days to complete the same work alone. If βCβ is 50% more efficient t...
25 men can complete a piece of work in 13 days. One man starts the work and after every day one more man joins the work and this continues till the work...
12Men and 12women can complete a piece of work in 9 days. 6 men and 15 women can complete the same work in 12 days. How long (in days) would it take 9 w...
- Pipes X and Y can fill a tank in 48 minutes and 80 minutes respectively. Another pipe Z can empty the tank in 2 hours. X and Z are opened together. If afte...
6 boys and 8 girls can do a piece of work in 12 days. 7 boys and 11 girls can do the same piece of work in 10 days. In how many days can 2 boys and 6 g...