Question

anybody tell the answer of this question​

Answer 1

Answer:

Step-by-step explanation:

length of rungs is given in A.P ( arithmetic progression)

also distance between each rungs = 25 cm

distance b/w top and bottom rung= 2.5 m =250 cm

total no. of rungs = 250/25 =10

wood required = R1+R2+..... +R10

we use formula for AP :

Sn=n/2 (a+l)           {where, a is length of R1, l is length of R10}

Sn= 10/2 (45+25)

Sn= 5(70)

Sn= 350