Bissoy.com
Doctors Medicines MCQs Q&A

The floor of a square room of dimensions 4 m × 4 m is to be paved with tiles. 75% of the floor is to be paved with square tiles of side 20 cm each and the remaining floor is to be paved with square tiles of side 25 cm. How many total numbers of tiles will be required to pave the floor of the room?

The floor of a square room of dimensions 4 m × 4 m is to be paved with tiles. 75% of the floor is to be paved with square tiles of side 20 cm each and the remaining floor is to be paved with square tiles of side 25 cm. How many total numbers of tiles will be required to pave the floor of the room? Correct Answer 364

Area of room = 4 m × 4 m = 400 cm × 400 cm = 160000 cm2

Area of room to be paved with tiles of side 20 cm = 75% of 160000 = 120000 cm2

Area of 1 tile of side 20 cm = 20 × 20 = 400 cm2

⇒ No. of tiles with side 20 cm required = 120000/400 = 300

Also,

Area of room to be paved with tiles of side 25 cm = 160000 – 120000 = 40000 cm2

Area of 1 tile of side 25 cm = 25 × 25 = 625 cm2

⇒ No. of tiles with side 25 cm required = 40000/625 = 64

∴ Total no. of tiles required to pave the room = 300 + 64 = 364

Related Questions

ABCD is a square. Inside the square ABCD there are yellow tiles and red tiles. Red tiles are among the diagonals of the square. Dimensions of red tiles and yellow tiles are 4 cm × 4 cm and 1 cm × 1 cm. If there are 61 red tiles, then what is the number of yellow tiles?
Five persons A, B, C, D and E are lives on the five-floor building. Each person lives on each floor. Bottom floor numbered as floor 1 and above the floor is numbered as floor 2 and so on top floor numbered as floor 5. B lives on the 4th floor. A is not an immediate neighbour of B and also not lives on the bottom floor. D neither lives on the top floor nor bottom floor. Who lives on the 3rd floor?
The length and breadth of the floor of the room are 20 feet and 10 feet respectively. Square tiles of 2 feet length of different colours are to be laid on the floor. Black tiles are laid in the first row on all sides. If white tiles are laid in the one-third of the remaining and blue tiles in the rest, how many blue tiles will be there ?
Six persons A, F, W, K, P and C live on the six-floor building. Each person lives on each floor. The lowest floor is numbered as floor 1, its above floor is numbered as floor 2 and so on and the top most floor is numbered as floor 6. F lives on floor 4. W lives between A and K. K does not lives on the lowest floor. K lives below F's floor. P lives on an even-numbered floor. Who lives between C and K?
Seven persons A, Q, E, F, L, M and C live on 7 floor building numbered as 1 to 7th floor from bottom to top. Bottom floor numbered as floor 1 and its above floor numbered as floor 2 and so on. Topmost floor numbered as floor 7. A lives on the 4th floor. Two persons live between A and F. M lives just above E. F does not live on the top floor. Q lives on the 2nd floor. L is not an immediate neighbour of Q and does not live on the top floor. Who lives on the top floor?
Five persons S, T, W, N and C live on five floor building. Each person lives on each floor. The lowest floor is numbered as floor 1, its above floor is numbered as floor 2 and so on and the top most floor is numbered as floor 5. T lives in the middle of the floor. W lives below T. W is not lives on the lowest floor. One person lives between T and S. S lives above T. Two persons lives between N and C. Who lives on the lowest floor?
Seven persons Q, D, E, R, L, P and W are living on the seven-floor building. Lower floor numbered as floor 1 and its above floor is numbered as floor 2 and so on the topmost floor is numbered as floor 7. Each person lives on each floor. Three persons are living between Q and P. P lives below Q. R lives on second floor. Two persons are living between R and E. L lives on odd number floor. D is not an immediate neighbour of Q. Who lives on 3rd floor?
Six persons A, D, E, Q, G and K are living on a building. Each person lives on each floor and the lowest floor is numbered as floor 1 and the floor it's above is called floor 2 and so on. The top floor is numbered as floor 6. A lives on floor 3. Two persons are living between A and E. Q lives just above G. G lives on the 1st floor. D lives on odd number floor. Who lives on the 4th floor?
Five persons A, L, K, D and S lives on five floor building. Each person lives on each floor. Bottom floor numbered as floor 1 and above floor is numbered as floor 2 and so on top floor numbered as floor 5. A lives between K and L. Neither K nor L lives on either top nor bottom floor. L lives below K. D does not lives on top floor. Who lives on top floor?
Ram goes to tiles shop to buy some tiles. Ram buys 10 red tiles, 7 green tiles and 6 black tiles. If two tiles are drawn at random for kitchen. What the probability that all the tiles are of same colours.