Class 6 : Excersice 10.3

12. How many tiles whose length and breath are 12cm and 5cm respectively will be needed to fit in a rectangular region whose length and breath are respectively :

a. 100cm and 144cm.

Solution

first let we find
 the total area of the region = 100 * 144
                                            = 14400 cm square
area of one tile = 5 * 12
                         = 60 cm square
Number of tiles required = 14400 / 60
                                        = 240

b. 70 cm and 36 cm

Solution

first let we find
 the total area of the region = 70 * 36
                                            = 2520 cm square
area of one tile = 5 * 12
                         = 60 cm square
Number of tiles required = 2520 / 60
                                        = 42