A rectangular floor of a room measures 5.4 m long and 4.2 m wide. The room is to be covered with square tiles. Calculate the minimum number of square tiles that can be used to cover the floor.

The sum of the interior angles of a regular polygon is 1260⁰. Find the size of each exterior angle of the polygon.

In a 4×400 m relay competition, a team of athletes each completed their round in 45 sec, 43 sec, 44 sec and 45 see respectively.

If the race started at 1:35:31 p.m., find the time when the team completed the race.

Three business partners, Kosgei, Kimani and Atieno contributed Ksh 1,750,000 towards an investment.

Kosgei contributed 20% of the money. Kimani and Atieno contributed the remainder in the ratio 3:5 respectively.

(a) (i) Calculate the amount of money Kimani contributed